./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/egcd3-ll_unwindbound50.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 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 02:07:03,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:07:03,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:07:03,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:07:03,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:07:03,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:07:03,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:07:03,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:07:03,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:07:03,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:07:03,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:07:03,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:07:03,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:07:03,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:07:03,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:07:03,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:07:03,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:07:03,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:07:03,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:07:03,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:07:03,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:07:03,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:07:03,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:07:03,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:07:03,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:07:03,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:07:03,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:07:03,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:07:03,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:07:03,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:07:03,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:07:03,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:07:03,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:07:03,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:07:03,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:07:03,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:07:03,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:07:03,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:07:03,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:07:03,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:07:03,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:07:03,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 02:07:03,404 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:07:03,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:07:03,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:07:03,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:07:03,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:07:03,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:07:03,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:07:03,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:07:03,406 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:07:03,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:07:03,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:07:03,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 02:07:03,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:07:03,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:07:03,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:07:03,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:07:03,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:07:03,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:07:03,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:07:03,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:07:03,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:07:03,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:07:03,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 02:07:03,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 02:07:03,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:07:03,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:07:03,410 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:07:03,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:07:03,411 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:07:03,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b [2023-02-18 02:07:03,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:07:03,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:07:03,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:07:03,636 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:07:03,636 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:07:03,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-02-18 02:07:04,690 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:07:04,812 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:07:04,813 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-02-18 02:07:04,817 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/254285b36/9ab00604b4e14573bb6bb77d80af391b/FLAGc967d8182 [2023-02-18 02:07:04,826 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/254285b36/9ab00604b4e14573bb6bb77d80af391b [2023-02-18 02:07:04,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:07:04,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:07:04,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:07:04,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:07:04,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:07:04,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:04,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ed9eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04, skipping insertion in model container [2023-02-18 02:07:04,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:04,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:07:04,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:07:04,937 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/egcd3-ll_unwindbound50.c[490,503] [2023-02-18 02:07:04,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:07:04,955 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:07:04,962 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/egcd3-ll_unwindbound50.c[490,503] [2023-02-18 02:07:04,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:07:04,975 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:07:04,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04 WrapperNode [2023-02-18 02:07:04,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:07:04,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:07:04,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:07:04,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:07:04,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:04,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:04,997 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2023-02-18 02:07:04,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:07:04,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:07:04,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:07:04,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:07:05,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,010 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:07:05,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:07:05,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:07:05,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:07:05,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (1/1) ... [2023-02-18 02:07:05,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:07:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:05,032 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) [2023-02-18 02:07:05,054 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 [2023-02-18 02:07:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:07:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 02:07:05,079 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 02:07:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 02:07:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:07:05,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:07:05,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:07:05,081 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:07:05,126 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:07:05,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:07:05,233 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:07:05,242 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:07:05,244 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 02:07:05,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:07:05 BoogieIcfgContainer [2023-02-18 02:07:05,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:07:05,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:07:05,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:07:05,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:07:05,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:07:04" (1/3) ... [2023-02-18 02:07:05,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566ac35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:07:05, skipping insertion in model container [2023-02-18 02:07:05,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:07:04" (2/3) ... [2023-02-18 02:07:05,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566ac35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:07:05, skipping insertion in model container [2023-02-18 02:07:05,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:07:05" (3/3) ... [2023-02-18 02:07:05,254 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2023-02-18 02:07:05,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:07:05,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:07:05,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:07:05,343 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;@5def7f8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:07:05,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:07:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 02:07:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 02:07:05,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:05,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:05,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2023-02-18 02:07:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146362844] [2023-02-18 02:07:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:05,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:05,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146362844] [2023-02-18 02:07:05,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 02:07:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276173309] [2023-02-18 02:07:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:05,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:05,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:05,448 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) [2023-02-18 02:07:05,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 02:07:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 02:07:05,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 02:07:05,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:05,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276173309] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:05,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:05,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:07:05,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139855435] [2023-02-18 02:07:05,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:05,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:07:05,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:07:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:07:05,588 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 02:07:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:05,609 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2023-02-18 02:07:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:07:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 02:07:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:05,615 INFO L225 Difference]: With dead ends: 67 [2023-02-18 02:07:05,615 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 02:07:05,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:07:05,620 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2023-02-18 02:07:05,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 02:07:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 02:07:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 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) [2023-02-18 02:07:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-18 02:07:05,643 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2023-02-18 02:07:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:05,643 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-18 02:07:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 02:07:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-18 02:07:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 02:07:05,645 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:05,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:05,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 02:07:05,847 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 [2023-02-18 02:07:05,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2023-02-18 02:07:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077173759] [2023-02-18 02:07:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:05,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:05,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238325681] [2023-02-18 02:07:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:05,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:05,893 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) [2023-02-18 02:07:05,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 02:07:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:05,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 02:07:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:05,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:05,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077173759] [2023-02-18 02:07:05,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238325681] [2023-02-18 02:07:05,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238325681] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:05,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:05,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 02:07:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548675983] [2023-02-18 02:07:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 02:07:05,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:05,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 02:07:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:07:06,000 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:06,031 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-02-18 02:07:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 02:07:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-18 02:07:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:06,032 INFO L225 Difference]: With dead ends: 40 [2023-02-18 02:07:06,033 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 02:07:06,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:07:06,034 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:06,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 02:07:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-18 02:07:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2023-02-18 02:07:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-18 02:07:06,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-02-18 02:07:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:06,040 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-18 02:07:06,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-18 02:07:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 02:07:06,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:06,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:06,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 02:07:06,245 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,SelfDestructingSolverStorable1 [2023-02-18 02:07:06,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:06,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2023-02-18 02:07:06,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:06,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403935336] [2023-02-18 02:07:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:06,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:06,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465137926] [2023-02-18 02:07:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:06,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:06,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:06,277 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) [2023-02-18 02:07:06,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 02:07:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 02:07:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:07:06,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:06,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403935336] [2023-02-18 02:07:06,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465137926] [2023-02-18 02:07:06,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465137926] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:06,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:06,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 02:07:06,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372705172] [2023-02-18 02:07:06,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:06,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 02:07:06,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 02:07:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:07:06,396 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:06,478 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-02-18 02:07:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:07:06,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-18 02:07:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:06,483 INFO L225 Difference]: With dead ends: 53 [2023-02-18 02:07:06,483 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 02:07:06,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 02:07:06,487 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:06,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 02:07:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-02-18 02:07:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-02-18 02:07:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-02-18 02:07:06,500 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2023-02-18 02:07:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:06,502 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-02-18 02:07:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-02-18 02:07:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 02:07:06,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:06,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:06,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:06,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:06,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2023-02-18 02:07:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:06,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415867921] [2023-02-18 02:07:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:06,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:06,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904954039] [2023-02-18 02:07:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:06,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:06,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:06,737 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) [2023-02-18 02:07:06,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 02:07:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 02:07:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:06,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:06,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:06,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415867921] [2023-02-18 02:07:06,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:06,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904954039] [2023-02-18 02:07:06,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904954039] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:06,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:06,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 02:07:06,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483568220] [2023-02-18 02:07:06,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:06,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:07:06,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:06,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:07:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:07:06,814 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:06,828 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-02-18 02:07:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 02:07:06,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-18 02:07:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:06,829 INFO L225 Difference]: With dead ends: 58 [2023-02-18 02:07:06,829 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 02:07:06,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:07:06,830 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:06,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 02:07:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-18 02:07:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2023-02-18 02:07:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-02-18 02:07:06,834 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2023-02-18 02:07:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:06,835 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-02-18 02:07:06,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-02-18 02:07:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 02:07:06,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:06,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:06,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:07,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:07,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2023-02-18 02:07:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:07,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747080546] [2023-02-18 02:07:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:07,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:07,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138949789] [2023-02-18 02:07:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:07,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:07,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:07,063 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) [2023-02-18 02:07:07,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 02:07:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 02:07:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:07:07,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:07,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:07,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747080546] [2023-02-18 02:07:07,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:07,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138949789] [2023-02-18 02:07:07,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138949789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:07,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:07,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 02:07:07,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679409072] [2023-02-18 02:07:07,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 02:07:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 02:07:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 02:07:07,179 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:07,254 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-18 02:07:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 02:07:07,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-18 02:07:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:07,255 INFO L225 Difference]: With dead ends: 54 [2023-02-18 02:07:07,255 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 02:07:07,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 02:07:07,256 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:07,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 02:07:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-18 02:07:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 02:07:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-18 02:07:07,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2023-02-18 02:07:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:07,263 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-18 02:07:07,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-18 02:07:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 02:07:07,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:07,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:07,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 02:07:07,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:07,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2023-02-18 02:07:07,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:07,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374297334] [2023-02-18 02:07:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:07,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:07,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:07,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792053795] [2023-02-18 02:07:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:07,479 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) [2023-02-18 02:07:07,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 02:07:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 02:07:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:07,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:07,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374297334] [2023-02-18 02:07:07,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792053795] [2023-02-18 02:07:07,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792053795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:07,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:07,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 02:07:07,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756618188] [2023-02-18 02:07:07,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:07,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 02:07:07,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 02:07:07,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:07:07,556 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:07,659 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2023-02-18 02:07:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 02:07:07,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-02-18 02:07:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:07,661 INFO L225 Difference]: With dead ends: 147 [2023-02-18 02:07:07,661 INFO L226 Difference]: Without dead ends: 140 [2023-02-18 02:07:07,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-02-18 02:07:07,662 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 83 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:07,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-18 02:07:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2023-02-18 02:07:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 02:07:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-18 02:07:07,674 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2023-02-18 02:07:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:07,674 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-18 02:07:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-18 02:07:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 02:07:07,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:07,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:07,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:07,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:07,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2023-02-18 02:07:07,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:07,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773201740] [2023-02-18 02:07:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:07,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:07,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600591525] [2023-02-18 02:07:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:07,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:07,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:07,891 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) [2023-02-18 02:07:07,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 02:07:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:07,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 02:07:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:07:07,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:07:08,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:08,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773201740] [2023-02-18 02:07:08,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:08,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600591525] [2023-02-18 02:07:08,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600591525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:08,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:08,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 02:07:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963259368] [2023-02-18 02:07:08,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:08,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 02:07:08,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:08,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 02:07:08,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 02:07:08,010 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 02:07:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:08,144 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-02-18 02:07:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 02:07:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-18 02:07:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:08,147 INFO L225 Difference]: With dead ends: 183 [2023-02-18 02:07:08,147 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 02:07:08,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-18 02:07:08,148 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:08,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 02:07:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2023-02-18 02:07:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 02:07:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2023-02-18 02:07:08,178 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2023-02-18 02:07:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:08,179 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2023-02-18 02:07:08,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 02:07:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2023-02-18 02:07:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 02:07:08,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:08,184 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:08,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:08,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:08,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2023-02-18 02:07:08,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:08,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508844680] [2023-02-18 02:07:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:08,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:08,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:08,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950374864] [2023-02-18 02:07:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:08,409 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) [2023-02-18 02:07:08,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 02:07:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 02:07:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:08,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:08,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508844680] [2023-02-18 02:07:08,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950374864] [2023-02-18 02:07:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950374864] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:07:08,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:07:08,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 02:07:08,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035611936] [2023-02-18 02:07:08,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 02:07:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 02:07:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:07:08,507 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 02:07:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:08,573 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-02-18 02:07:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 02:07:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-18 02:07:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:08,575 INFO L225 Difference]: With dead ends: 143 [2023-02-18 02:07:08,575 INFO L226 Difference]: Without dead ends: 141 [2023-02-18 02:07:08,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:07:08,575 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:08,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-18 02:07:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-02-18 02:07:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 02:07:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2023-02-18 02:07:08,584 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2023-02-18 02:07:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:08,584 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2023-02-18 02:07:08,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 02:07:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2023-02-18 02:07:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 02:07:08,584 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:08,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:08,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 02:07:08,788 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,SelfDestructingSolverStorable7 [2023-02-18 02:07:08,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2023-02-18 02:07:08,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:08,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550522030] [2023-02-18 02:07:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:08,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:08,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980875292] [2023-02-18 02:07:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:08,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:08,798 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) [2023-02-18 02:07:08,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 02:07:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 02:07:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:07:08,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:08,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550522030] [2023-02-18 02:07:08,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:08,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980875292] [2023-02-18 02:07:08,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980875292] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:08,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:08,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-18 02:07:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789486891] [2023-02-18 02:07:08,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:08,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 02:07:08,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 02:07:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 02:07:08,904 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:09,031 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2023-02-18 02:07:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 02:07:09,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-18 02:07:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:09,033 INFO L225 Difference]: With dead ends: 175 [2023-02-18 02:07:09,033 INFO L226 Difference]: Without dead ends: 173 [2023-02-18 02:07:09,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-18 02:07:09,034 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:09,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 333 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-18 02:07:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2023-02-18 02:07:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 02:07:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2023-02-18 02:07:09,053 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2023-02-18 02:07:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:09,054 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2023-02-18 02:07:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2023-02-18 02:07:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 02:07:09,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:09,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:09,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:09,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:09,259 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2023-02-18 02:07:09,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:09,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232953694] [2023-02-18 02:07:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:09,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:09,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465762620] [2023-02-18 02:07:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:09,302 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) [2023-02-18 02:07:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 02:07:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 02:07:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:09,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:09,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232953694] [2023-02-18 02:07:09,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:09,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465762620] [2023-02-18 02:07:09,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465762620] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:09,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:09,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:07:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045031434] [2023-02-18 02:07:09,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:09,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 02:07:09,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 02:07:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:07:09,356 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:09,374 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2023-02-18 02:07:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:07:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-02-18 02:07:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:09,375 INFO L225 Difference]: With dead ends: 237 [2023-02-18 02:07:09,375 INFO L226 Difference]: Without dead ends: 170 [2023-02-18 02:07:09,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:07:09,376 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:09,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 105 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-18 02:07:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-02-18 02:07:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 02:07:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2023-02-18 02:07:09,386 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2023-02-18 02:07:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:09,386 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2023-02-18 02:07:09,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2023-02-18 02:07:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 02:07:09,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:09,387 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:09,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-18 02:07:09,591 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,SelfDestructingSolverStorable9 [2023-02-18 02:07:09,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2023-02-18 02:07:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105256722] [2023-02-18 02:07:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:09,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:09,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362386264] [2023-02-18 02:07:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:09,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:09,599 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) [2023-02-18 02:07:09,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 02:07:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 02:07:09,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 02:07:09,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 02:07:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105256722] [2023-02-18 02:07:09,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362386264] [2023-02-18 02:07:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362386264] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 02:07:09,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:07:09,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-18 02:07:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464518561] [2023-02-18 02:07:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 02:07:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 02:07:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 02:07:09,691 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:09,736 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2023-02-18 02:07:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:07:09,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-18 02:07:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:09,739 INFO L225 Difference]: With dead ends: 235 [2023-02-18 02:07:09,739 INFO L226 Difference]: Without dead ends: 233 [2023-02-18 02:07:09,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:07:09,740 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:09,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-18 02:07:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2023-02-18 02:07:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 02:07:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2023-02-18 02:07:09,755 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2023-02-18 02:07:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:09,755 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2023-02-18 02:07:09,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2023-02-18 02:07:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 02:07:09,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:09,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:09,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-18 02:07:09,960 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,SelfDestructingSolverStorable10 [2023-02-18 02:07:09,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:09,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2023-02-18 02:07:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:09,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17851463] [2023-02-18 02:07:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:09,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:09,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:09,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761224681] [2023-02-18 02:07:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:09,968 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) [2023-02-18 02:07:09,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 02:07:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 02:07:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:07:10,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:10,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17851463] [2023-02-18 02:07:10,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761224681] [2023-02-18 02:07:10,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761224681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:10,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:10,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-02-18 02:07:10,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931942815] [2023-02-18 02:07:10,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:10,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 02:07:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 02:07:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-18 02:07:10,222 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 02:07:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:12,339 INFO L93 Difference]: Finished difference Result 370 states and 531 transitions. [2023-02-18 02:07:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 02:07:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2023-02-18 02:07:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:12,342 INFO L225 Difference]: With dead ends: 370 [2023-02-18 02:07:12,342 INFO L226 Difference]: Without dead ends: 368 [2023-02-18 02:07:12,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 02:07:12,343 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 209 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:12,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 343 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 02:07:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-18 02:07:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 315. [2023-02-18 02:07:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 235 states have (on average 1.3914893617021276) internal successors, (327), 242 states have internal predecessors, (327), 63 states have call successors, (63), 16 states have call predecessors, (63), 16 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-18 02:07:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 452 transitions. [2023-02-18 02:07:12,379 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 452 transitions. Word has length 37 [2023-02-18 02:07:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:12,379 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 452 transitions. [2023-02-18 02:07:12,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 02:07:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 452 transitions. [2023-02-18 02:07:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 02:07:12,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:12,380 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:12,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:12,585 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,SelfDestructingSolverStorable11 [2023-02-18 02:07:12,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2023-02-18 02:07:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690461392] [2023-02-18 02:07:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:12,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:12,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:12,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653499165] [2023-02-18 02:07:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:12,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:12,605 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) [2023-02-18 02:07:12,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 02:07:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 02:07:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 02:07:12,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 02:07:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690461392] [2023-02-18 02:07:12,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653499165] [2023-02-18 02:07:12,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653499165] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 02:07:12,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:07:12,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-18 02:07:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856263239] [2023-02-18 02:07:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:07:12,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:07:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 02:07:12,869 INFO L87 Difference]: Start difference. First operand 315 states and 452 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 02:07:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:12,937 INFO L93 Difference]: Finished difference Result 324 states and 460 transitions. [2023-02-18 02:07:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:07:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-02-18 02:07:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:12,939 INFO L225 Difference]: With dead ends: 324 [2023-02-18 02:07:12,939 INFO L226 Difference]: Without dead ends: 322 [2023-02-18 02:07:12,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:07:12,942 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:12,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-02-18 02:07:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-02-18 02:07:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 238 states have (on average 1.3781512605042017) internal successors, (328), 245 states have internal predecessors, (328), 63 states have call successors, (63), 17 states have call predecessors, (63), 17 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-18 02:07:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 453 transitions. [2023-02-18 02:07:12,987 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 453 transitions. Word has length 40 [2023-02-18 02:07:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:12,987 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 453 transitions. [2023-02-18 02:07:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 02:07:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 453 transitions. [2023-02-18 02:07:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 02:07:12,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:12,988 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:12,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:13,190 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,SelfDestructingSolverStorable12 [2023-02-18 02:07:13,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2023-02-18 02:07:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488593766] [2023-02-18 02:07:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:13,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:13,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722356926] [2023-02-18 02:07:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:13,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:13,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:13,204 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) [2023-02-18 02:07:13,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 02:07:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 02:07:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 02:07:13,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 02:07:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488593766] [2023-02-18 02:07:13,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722356926] [2023-02-18 02:07:13,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722356926] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:13,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:13,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-18 02:07:13,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921542941] [2023-02-18 02:07:13,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:13,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 02:07:13,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 02:07:13,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:07:13,304 INFO L87 Difference]: Start difference. First operand 319 states and 453 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:13,462 INFO L93 Difference]: Finished difference Result 781 states and 1094 transitions. [2023-02-18 02:07:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 02:07:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-02-18 02:07:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:13,465 INFO L225 Difference]: With dead ends: 781 [2023-02-18 02:07:13,465 INFO L226 Difference]: Without dead ends: 592 [2023-02-18 02:07:13,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-02-18 02:07:13,467 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 136 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:13,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-02-18 02:07:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 562. [2023-02-18 02:07:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 406 states have (on average 1.3177339901477831) internal successors, (535), 416 states have internal predecessors, (535), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2023-02-18 02:07:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 759 transitions. [2023-02-18 02:07:13,560 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 759 transitions. Word has length 38 [2023-02-18 02:07:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:13,560 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 759 transitions. [2023-02-18 02:07:13,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 759 transitions. [2023-02-18 02:07:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 02:07:13,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:13,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:13,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 02:07:13,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:13,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2023-02-18 02:07:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:13,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830069464] [2023-02-18 02:07:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:13,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:13,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351084393] [2023-02-18 02:07:13,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:07:13,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:13,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:13,772 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) [2023-02-18 02:07:13,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 02:07:13,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:07:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:07:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 02:07:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:13,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:13,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830069464] [2023-02-18 02:07:13,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351084393] [2023-02-18 02:07:13,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351084393] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:13,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:13,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:07:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095130665] [2023-02-18 02:07:13,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:13,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:07:13,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:07:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:07:13,818 INFO L87 Difference]: Start difference. First operand 562 states and 759 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:13,937 INFO L93 Difference]: Finished difference Result 874 states and 1229 transitions. [2023-02-18 02:07:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:07:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-02-18 02:07:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:13,939 INFO L225 Difference]: With dead ends: 874 [2023-02-18 02:07:13,939 INFO L226 Difference]: Without dead ends: 679 [2023-02-18 02:07:13,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 02:07:13,945 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:13,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2023-02-18 02:07:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 553. [2023-02-18 02:07:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 401 states have (on average 1.3167082294264338) internal successors, (528), 411 states have internal predecessors, (528), 110 states have call successors, (110), 41 states have call predecessors, (110), 41 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2023-02-18 02:07:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2023-02-18 02:07:14,004 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2023-02-18 02:07:14,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:14,004 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2023-02-18 02:07:14,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 02:07:14,004 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2023-02-18 02:07:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 02:07:14,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:14,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:14,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:14,209 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,SelfDestructingSolverStorable14 [2023-02-18 02:07:14,209 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2023-02-18 02:07:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:14,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518308359] [2023-02-18 02:07:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:14,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:14,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:14,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421955970] [2023-02-18 02:07:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:14,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:14,217 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) [2023-02-18 02:07:14,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 02:07:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 02:07:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:14,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:07:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:14,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518308359] [2023-02-18 02:07:14,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:14,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421955970] [2023-02-18 02:07:14,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421955970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:14,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:14,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 02:07:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39462365] [2023-02-18 02:07:14,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 02:07:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 02:07:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 02:07:14,303 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:14,568 INFO L93 Difference]: Finished difference Result 1157 states and 1577 transitions. [2023-02-18 02:07:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 02:07:14,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-02-18 02:07:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:14,571 INFO L225 Difference]: With dead ends: 1157 [2023-02-18 02:07:14,571 INFO L226 Difference]: Without dead ends: 817 [2023-02-18 02:07:14,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-02-18 02:07:14,572 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 212 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:14,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 360 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:07:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-02-18 02:07:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 780. [2023-02-18 02:07:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 558 states have (on average 1.2724014336917562) internal successors, (710), 572 states have internal predecessors, (710), 164 states have call successors, (164), 57 states have call predecessors, (164), 57 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2023-02-18 02:07:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1032 transitions. [2023-02-18 02:07:14,663 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1032 transitions. Word has length 39 [2023-02-18 02:07:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:14,664 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1032 transitions. [2023-02-18 02:07:14,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:07:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1032 transitions. [2023-02-18 02:07:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 02:07:14,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:14,664 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:14,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:14,869 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,SelfDestructingSolverStorable15 [2023-02-18 02:07:14,869 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2023-02-18 02:07:14,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:14,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948076923] [2023-02-18 02:07:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:14,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:14,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164515963] [2023-02-18 02:07:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:14,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:14,876 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) [2023-02-18 02:07:14,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 02:07:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:14,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 02:07:14,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 02:07:15,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 02:07:16,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948076923] [2023-02-18 02:07:16,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164515963] [2023-02-18 02:07:16,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164515963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:16,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:16,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-02-18 02:07:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615544769] [2023-02-18 02:07:16,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 02:07:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 02:07:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-02-18 02:07:16,014 INFO L87 Difference]: Start difference. First operand 780 states and 1032 transitions. Second operand has 27 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 02:07:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:36,488 INFO L93 Difference]: Finished difference Result 1216 states and 1687 transitions. [2023-02-18 02:07:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 02:07:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 54 [2023-02-18 02:07:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:36,494 INFO L225 Difference]: With dead ends: 1216 [2023-02-18 02:07:36,494 INFO L226 Difference]: Without dead ends: 1194 [2023-02-18 02:07:36,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=745, Invalid=3545, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 02:07:36,495 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 317 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:36,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 841 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2023-02-18 02:07:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2023-02-18 02:07:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 856. [2023-02-18 02:07:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 613 states have (on average 1.272430668841762) internal successors, (780), 623 states have internal predecessors, (780), 181 states have call successors, (181), 61 states have call predecessors, (181), 61 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2023-02-18 02:07:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1137 transitions. [2023-02-18 02:07:36,677 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1137 transitions. Word has length 54 [2023-02-18 02:07:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:36,677 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1137 transitions. [2023-02-18 02:07:36,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 02:07:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1137 transitions. [2023-02-18 02:07:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 02:07:36,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:36,678 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:36,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 02:07:36,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2023-02-18 02:07:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942374245] [2023-02-18 02:07:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:36,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:36,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842878588] [2023-02-18 02:07:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:36,891 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) [2023-02-18 02:07:36,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 02:07:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 02:07:36,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 02:07:36,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 02:07:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942374245] [2023-02-18 02:07:37,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:37,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842878588] [2023-02-18 02:07:37,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842878588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:37,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:37,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 02:07:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514169661] [2023-02-18 02:07:37,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 02:07:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 02:07:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 02:07:37,030 INFO L87 Difference]: Start difference. First operand 856 states and 1137 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 02:07:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:37,642 INFO L93 Difference]: Finished difference Result 1850 states and 2568 transitions. [2023-02-18 02:07:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 02:07:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2023-02-18 02:07:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:37,648 INFO L225 Difference]: With dead ends: 1850 [2023-02-18 02:07:37,648 INFO L226 Difference]: Without dead ends: 1828 [2023-02-18 02:07:37,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-02-18 02:07:37,649 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 357 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:37,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 388 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 02:07:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2023-02-18 02:07:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1729. [2023-02-18 02:07:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1252 states have (on average 1.299520766773163) internal successors, (1627), 1285 states have internal predecessors, (1627), 379 states have call successors, (379), 97 states have call predecessors, (379), 97 states have return successors, (370), 346 states have call predecessors, (370), 370 states have call successors, (370) [2023-02-18 02:07:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2376 transitions. [2023-02-18 02:07:38,017 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2376 transitions. Word has length 60 [2023-02-18 02:07:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:38,017 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2376 transitions. [2023-02-18 02:07:38,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-18 02:07:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2376 transitions. [2023-02-18 02:07:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 02:07:38,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:38,018 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2023-02-18 02:07:38,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 02:07:38,222 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1269665814, now seen corresponding path program 1 times [2023-02-18 02:07:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:38,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671678161] [2023-02-18 02:07:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:38,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912662443] [2023-02-18 02:07:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:38,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:38,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:38,233 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) [2023-02-18 02:07:38,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 02:07:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 02:07:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 02:07:38,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:07:38,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:38,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671678161] [2023-02-18 02:07:38,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:38,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912662443] [2023-02-18 02:07:38,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912662443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:07:38,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:07:38,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:07:38,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821627] [2023-02-18 02:07:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:07:38,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:07:38,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:07:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:07:38,280 INFO L87 Difference]: Start difference. First operand 1729 states and 2376 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 02:07:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:38,753 INFO L93 Difference]: Finished difference Result 3297 states and 4600 transitions. [2023-02-18 02:07:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:07:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-02-18 02:07:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:38,759 INFO L225 Difference]: With dead ends: 3297 [2023-02-18 02:07:38,759 INFO L226 Difference]: Without dead ends: 2086 [2023-02-18 02:07:38,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:07:38,762 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:38,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:07:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-02-18 02:07:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1936. [2023-02-18 02:07:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1366 states have (on average 1.3030746705710103) internal successors, (1780), 1401 states have internal predecessors, (1780), 473 states have call successors, (473), 96 states have call predecessors, (473), 96 states have return successors, (464), 438 states have call predecessors, (464), 464 states have call successors, (464) [2023-02-18 02:07:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2717 transitions. [2023-02-18 02:07:39,221 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2717 transitions. Word has length 62 [2023-02-18 02:07:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:39,221 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 2717 transitions. [2023-02-18 02:07:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 02:07:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2717 transitions. [2023-02-18 02:07:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 02:07:39,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:39,222 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:39,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 02:07:39,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:39,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1765617383, now seen corresponding path program 1 times [2023-02-18 02:07:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:39,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608787245] [2023-02-18 02:07:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:39,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469655825] [2023-02-18 02:07:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:39,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:39,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:39,433 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) [2023-02-18 02:07:39,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 02:07:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:07:39,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 02:07:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-18 02:07:39,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 02:07:40,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:40,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608787245] [2023-02-18 02:07:40,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:40,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469655825] [2023-02-18 02:07:40,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469655825] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:40,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:40,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-18 02:07:40,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604241316] [2023-02-18 02:07:40,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 02:07:40,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 02:07:40,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-02-18 02:07:40,206 INFO L87 Difference]: Start difference. First operand 1936 states and 2717 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-18 02:07:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:07:49,621 INFO L93 Difference]: Finished difference Result 2304 states and 3183 transitions. [2023-02-18 02:07:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 02:07:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2023-02-18 02:07:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:07:49,628 INFO L225 Difference]: With dead ends: 2304 [2023-02-18 02:07:49,628 INFO L226 Difference]: Without dead ends: 2298 [2023-02-18 02:07:49,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 02:07:49,629 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 210 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:07:49,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 579 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-02-18 02:07:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2023-02-18 02:07:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2181. [2023-02-18 02:07:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 1549 states have (on average 1.3021304067140091) internal successors, (2017), 1587 states have internal predecessors, (2017), 516 states have call successors, (516), 116 states have call predecessors, (516), 115 states have return successors, (508), 477 states have call predecessors, (508), 508 states have call successors, (508) [2023-02-18 02:07:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3041 transitions. [2023-02-18 02:07:50,264 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3041 transitions. Word has length 64 [2023-02-18 02:07:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:07:50,264 INFO L495 AbstractCegarLoop]: Abstraction has 2181 states and 3041 transitions. [2023-02-18 02:07:50,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-18 02:07:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3041 transitions. [2023-02-18 02:07:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-18 02:07:50,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:07:50,265 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:07:50,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 02:07:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:50,470 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:07:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:07:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 2 times [2023-02-18 02:07:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:07:50,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086078329] [2023-02-18 02:07:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:07:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:07:50,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:07:50,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489371828] [2023-02-18 02:07:50,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:07:50,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:07:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:07:50,482 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) [2023-02-18 02:07:50,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 02:07:50,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:07:50,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:07:50,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 02:07:50,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:07:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 02:07:51,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:07:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-18 02:07:51,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:07:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086078329] [2023-02-18 02:07:51,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:07:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489371828] [2023-02-18 02:07:51,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489371828] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:07:51,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:07:51,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-18 02:07:51,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510278585] [2023-02-18 02:07:51,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:07:51,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 02:07:51,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:07:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 02:07:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-18 02:07:51,524 INFO L87 Difference]: Start difference. First operand 2181 states and 3041 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-18 02:08:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:08:22,224 INFO L93 Difference]: Finished difference Result 2820 states and 3974 transitions. [2023-02-18 02:08:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 02:08:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2023-02-18 02:08:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:08:22,233 INFO L225 Difference]: With dead ends: 2820 [2023-02-18 02:08:22,233 INFO L226 Difference]: Without dead ends: 2818 [2023-02-18 02:08:22,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=872, Invalid=4098, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 02:08:22,235 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 297 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-02-18 02:08:22,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 792 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2023-02-18 02:08:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2023-02-18 02:08:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2301. [2023-02-18 02:08:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 1654 states have (on average 1.3035066505441355) internal successors, (2156), 1698 states have internal predecessors, (2156), 524 states have call successors, (524), 123 states have call predecessors, (524), 122 states have return successors, (516), 479 states have call predecessors, (516), 516 states have call successors, (516) [2023-02-18 02:08:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3196 transitions. [2023-02-18 02:08:22,899 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3196 transitions. Word has length 66 [2023-02-18 02:08:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:08:22,899 INFO L495 AbstractCegarLoop]: Abstraction has 2301 states and 3196 transitions. [2023-02-18 02:08:22,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 6 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-18 02:08:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3196 transitions. [2023-02-18 02:08:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-18 02:08:22,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:08:22,901 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-02-18 02:08:22,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 02:08:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:08:23,105 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:08:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:08:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash -191939833, now seen corresponding path program 1 times [2023-02-18 02:08:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:08:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571050533] [2023-02-18 02:08:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:08:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:08:23,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:08:23,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242148112] [2023-02-18 02:08:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:08:23,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:08:23,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:08:23,115 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:08:23,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 02:08:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:08:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 02:08:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:08:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-02-18 02:08:23,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:08:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 02:08:23,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:08:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571050533] [2023-02-18 02:08:23,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:08:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242148112] [2023-02-18 02:08:23,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242148112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:08:23,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:08:23,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-18 02:08:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723788087] [2023-02-18 02:08:23,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:08:23,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 02:08:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:08:23,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 02:08:23,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-02-18 02:08:23,648 INFO L87 Difference]: Start difference. First operand 2301 states and 3196 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 02:08:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:08:35,989 INFO L93 Difference]: Finished difference Result 2723 states and 3749 transitions. [2023-02-18 02:08:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 02:08:35,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2023-02-18 02:08:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:08:36,003 INFO L225 Difference]: With dead ends: 2723 [2023-02-18 02:08:36,003 INFO L226 Difference]: Without dead ends: 2702 [2023-02-18 02:08:36,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1242, Invalid=5238, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 02:08:36,006 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 361 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:08:36,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1043 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-02-18 02:08:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2023-02-18 02:08:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2457. [2023-02-18 02:08:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 1754 states have (on average 1.298175598631699) internal successors, (2277), 1801 states have internal predecessors, (2277), 565 states have call successors, (565), 137 states have call predecessors, (565), 137 states have return successors, (559), 518 states have call predecessors, (559), 559 states have call successors, (559) [2023-02-18 02:08:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3401 transitions. [2023-02-18 02:08:36,875 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3401 transitions. Word has length 77 [2023-02-18 02:08:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:08:36,875 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 3401 transitions. [2023-02-18 02:08:36,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 02:08:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3401 transitions. [2023-02-18 02:08:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 02:08:36,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:08:36,878 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:08:36,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 02:08:37,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:08:37,082 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:08:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:08:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash -558295812, now seen corresponding path program 1 times [2023-02-18 02:08:37,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:08:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964773152] [2023-02-18 02:08:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:08:37,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:08:37,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:08:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353200684] [2023-02-18 02:08:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:08:37,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:08:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:08:37,089 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:08:37,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 02:08:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:08:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 02:08:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:08:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-18 02:08:37,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:08:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-02-18 02:08:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:08:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964773152] [2023-02-18 02:08:37,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:08:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353200684] [2023-02-18 02:08:37,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353200684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:08:37,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:08:37,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2023-02-18 02:08:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212053975] [2023-02-18 02:08:37,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:08:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 02:08:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:08:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 02:08:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-02-18 02:08:37,544 INFO L87 Difference]: Start difference. First operand 2457 states and 3401 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 02:08:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:08:42,078 INFO L93 Difference]: Finished difference Result 3812 states and 5553 transitions. [2023-02-18 02:08:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-18 02:08:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 92 [2023-02-18 02:08:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:08:42,095 INFO L225 Difference]: With dead ends: 3812 [2023-02-18 02:08:42,095 INFO L226 Difference]: Without dead ends: 3808 [2023-02-18 02:08:42,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1332, Invalid=4988, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 02:08:42,097 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 439 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:08:42,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1358 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-18 02:08:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2023-02-18 02:08:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3254. [2023-02-18 02:08:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 2169 states have (on average 1.338865836791148) internal successors, (2904), 2237 states have internal predecessors, (2904), 932 states have call successors, (932), 153 states have call predecessors, (932), 152 states have return successors, (926), 863 states have call predecessors, (926), 926 states have call successors, (926) [2023-02-18 02:08:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 4762 transitions. [2023-02-18 02:08:43,533 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 4762 transitions. Word has length 92 [2023-02-18 02:08:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:08:43,533 INFO L495 AbstractCegarLoop]: Abstraction has 3254 states and 4762 transitions. [2023-02-18 02:08:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 21 states have internal predecessors, (66), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 02:08:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 4762 transitions. [2023-02-18 02:08:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 02:08:43,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:08:43,535 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:08:43,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 02:08:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:08:43,739 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:08:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:08:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1736118861, now seen corresponding path program 2 times [2023-02-18 02:08:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:08:43,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459740877] [2023-02-18 02:08:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:08:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:08:43,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:08:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908065886] [2023-02-18 02:08:43,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:08:43,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:08:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:08:43,746 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:08:43,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 02:08:43,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:08:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:08:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 02:08:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:08:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-18 02:08:43,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:08:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-18 02:08:45,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:08:45,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459740877] [2023-02-18 02:08:45,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:08:45,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908065886] [2023-02-18 02:08:45,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908065886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:08:45,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:08:45,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 02:08:45,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529505051] [2023-02-18 02:08:45,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:08:45,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 02:08:45,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:08:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 02:08:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 02:08:45,127 INFO L87 Difference]: Start difference. First operand 3254 states and 4762 transitions. Second operand has 33 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 9 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 02:08:48,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:08:56,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:09:08,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:09:10,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:09:18,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:09:19,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:09:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:09:24,488 INFO L93 Difference]: Finished difference Result 4409 states and 6343 transitions. [2023-02-18 02:09:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 02:09:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 9 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 94 [2023-02-18 02:09:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:09:24,513 INFO L225 Difference]: With dead ends: 4409 [2023-02-18 02:09:24,514 INFO L226 Difference]: Without dead ends: 4403 [2023-02-18 02:09:24,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1998, Invalid=6932, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 02:09:24,517 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 658 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 596 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.8s IncrementalHoareTripleChecker+Time [2023-02-18 02:09:24,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 925 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 2395 Invalid, 3 Unknown, 0 Unchecked, 29.8s Time] [2023-02-18 02:09:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2023-02-18 02:09:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 3976. [2023-02-18 02:09:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 2778 states have (on average 1.3416126709863212) internal successors, (3727), 2860 states have internal predecessors, (3727), 1006 states have call successors, (1006), 192 states have call predecessors, (1006), 191 states have return successors, (1002), 923 states have call predecessors, (1002), 1002 states have call successors, (1002) [2023-02-18 02:09:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 5735 transitions. [2023-02-18 02:09:26,366 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 5735 transitions. Word has length 94 [2023-02-18 02:09:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:09:26,367 INFO L495 AbstractCegarLoop]: Abstraction has 3976 states and 5735 transitions. [2023-02-18 02:09:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 9 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 02:09:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 5735 transitions. [2023-02-18 02:09:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 02:09:26,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:09:26,368 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2023-02-18 02:09:26,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 02:09:26,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:09:26,573 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:09:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:09:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2023-02-18 02:09:26,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:09:26,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641302250] [2023-02-18 02:09:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:09:26,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:09:26,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:09:26,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189304011] [2023-02-18 02:09:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:09:26,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:09:26,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:09:26,583 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:09:26,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 02:09:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:09:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 02:09:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:09:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 02:09:26,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:09:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 02:09:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:09:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641302250] [2023-02-18 02:09:26,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:09:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189304011] [2023-02-18 02:09:26,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189304011] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:09:26,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:09:26,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-18 02:09:26,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280503068] [2023-02-18 02:09:26,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:09:26,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 02:09:26,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:09:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 02:09:26,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-18 02:09:26,830 INFO L87 Difference]: Start difference. First operand 3976 states and 5735 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 02:09:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:09:31,828 INFO L93 Difference]: Finished difference Result 10340 states and 15763 transitions. [2023-02-18 02:09:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 02:09:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2023-02-18 02:09:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:09:31,860 INFO L225 Difference]: With dead ends: 10340 [2023-02-18 02:09:31,860 INFO L226 Difference]: Without dead ends: 8964 [2023-02-18 02:09:31,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 02:09:31,867 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 478 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 02:09:31,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 694 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 02:09:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2023-02-18 02:09:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 8481. [2023-02-18 02:09:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8481 states, 5490 states have (on average 1.346448087431694) internal successors, (7392), 5571 states have internal predecessors, (7392), 2652 states have call successors, (2652), 339 states have call predecessors, (2652), 338 states have return successors, (2642), 2570 states have call predecessors, (2642), 2642 states have call successors, (2642) [2023-02-18 02:09:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8481 states to 8481 states and 12686 transitions. [2023-02-18 02:09:36,387 INFO L78 Accepts]: Start accepts. Automaton has 8481 states and 12686 transitions. Word has length 94 [2023-02-18 02:09:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:09:36,387 INFO L495 AbstractCegarLoop]: Abstraction has 8481 states and 12686 transitions. [2023-02-18 02:09:36,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 02:09:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 8481 states and 12686 transitions. [2023-02-18 02:09:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-18 02:09:36,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:09:36,392 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 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] [2023-02-18 02:09:36,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 02:09:36,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 02:09:36,601 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:09:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:09:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2023-02-18 02:09:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:09:36,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070397125] [2023-02-18 02:09:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:09:36,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:09:36,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:09:36,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236371307] [2023-02-18 02:09:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:09:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:09:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:09:36,608 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:09:36,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 02:09:36,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:09:36,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:09:36,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 02:09:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:09:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-02-18 02:09:36,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:09:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-02-18 02:09:36,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:09:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070397125] [2023-02-18 02:09:36,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:09:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236371307] [2023-02-18 02:09:36,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236371307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:09:36,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:09:36,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-18 02:09:36,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113402049] [2023-02-18 02:09:36,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:09:36,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 02:09:36,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:09:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 02:09:36,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:09:36,730 INFO L87 Difference]: Start difference. First operand 8481 states and 12686 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 02:09:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:09:43,065 INFO L93 Difference]: Finished difference Result 11745 states and 17757 transitions. [2023-02-18 02:09:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 02:09:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2023-02-18 02:09:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:09:43,110 INFO L225 Difference]: With dead ends: 11745 [2023-02-18 02:09:43,124 INFO L226 Difference]: Without dead ends: 11171 [2023-02-18 02:09:43,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 02:09:43,145 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 235 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 02:09:43,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 538 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 02:09:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11171 states. [2023-02-18 02:09:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11171 to 8661. [2023-02-18 02:09:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 5649 states have (on average 1.3423614799079484) internal successors, (7583), 5731 states have internal predecessors, (7583), 2673 states have call successors, (2673), 339 states have call predecessors, (2673), 338 states have return successors, (2663), 2590 states have call predecessors, (2663), 2663 states have call successors, (2663) [2023-02-18 02:09:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 12919 transitions. [2023-02-18 02:09:47,747 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 12919 transitions. Word has length 95 [2023-02-18 02:09:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:09:47,748 INFO L495 AbstractCegarLoop]: Abstraction has 8661 states and 12919 transitions. [2023-02-18 02:09:47,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 02:09:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 12919 transitions. [2023-02-18 02:09:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 02:09:47,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:09:47,750 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:09:47,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-18 02:09:47,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 02:09:47,954 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:09:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:09:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1771605345, now seen corresponding path program 2 times [2023-02-18 02:09:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:09:47,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818232941] [2023-02-18 02:09:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:09:47,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:09:47,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:09:47,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067424056] [2023-02-18 02:09:47,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:09:47,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:09:47,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:09:47,964 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:09:47,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 02:09:48,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:09:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:09:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 02:09:48,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:09:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 53 proven. 47 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-18 02:09:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:09:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-18 02:09:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:09:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818232941] [2023-02-18 02:09:53,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:09:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067424056] [2023-02-18 02:09:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067424056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:09:53,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:09:53,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2023-02-18 02:09:53,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253249815] [2023-02-18 02:09:53,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:09:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 02:09:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:09:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 02:09:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=965, Unknown=1, NotChecked=0, Total=1122 [2023-02-18 02:09:53,871 INFO L87 Difference]: Start difference. First operand 8661 states and 12919 transitions. Second operand has 34 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-18 02:10:04,286 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 [] [2023-02-18 02:10:18,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:10:21,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:10:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:10:56,558 INFO L93 Difference]: Finished difference Result 11639 states and 17025 transitions. [2023-02-18 02:10:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-18 02:10:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 107 [2023-02-18 02:10:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:10:56,580 INFO L225 Difference]: With dead ends: 11639 [2023-02-18 02:10:56,580 INFO L226 Difference]: Without dead ends: 11588 [2023-02-18 02:10:56,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4602 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=2715, Invalid=11326, Unknown=1, NotChecked=0, Total=14042 [2023-02-18 02:10:56,585 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 679 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 3878 mSolverCounterSat, 829 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 4710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 3878 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2023-02-18 02:10:56,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1477 Invalid, 4710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 3878 Invalid, 3 Unknown, 0 Unchecked, 38.7s Time] [2023-02-18 02:10:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11588 states. [2023-02-18 02:11:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11588 to 10322. [2023-02-18 02:11:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10322 states, 6896 states have (on average 1.3401972157772621) internal successors, (9242), 6992 states have internal predecessors, (9242), 3024 states have call successors, (3024), 402 states have call predecessors, (3024), 401 states have return successors, (3014), 2927 states have call predecessors, (3014), 3014 states have call successors, (3014) [2023-02-18 02:11:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10322 states to 10322 states and 15280 transitions. [2023-02-18 02:11:04,009 INFO L78 Accepts]: Start accepts. Automaton has 10322 states and 15280 transitions. Word has length 107 [2023-02-18 02:11:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:04,011 INFO L495 AbstractCegarLoop]: Abstraction has 10322 states and 15280 transitions. [2023-02-18 02:11:04,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2023-02-18 02:11:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10322 states and 15280 transitions. [2023-02-18 02:11:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 02:11:04,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:04,013 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:11:04,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:04,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 02:11:04,217 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1018938325, now seen corresponding path program 1 times [2023-02-18 02:11:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:04,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073832690] [2023-02-18 02:11:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:04,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:04,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319304890] [2023-02-18 02:11:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:04,225 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:11:04,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 02:11:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 02:11:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 02:11:04,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-02-18 02:11:04,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073832690] [2023-02-18 02:11:04,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319304890] [2023-02-18 02:11:04,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319304890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:04,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:04,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-18 02:11:04,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69020829] [2023-02-18 02:11:04,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:04,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 02:11:04,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:04,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 02:11:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-18 02:11:04,476 INFO L87 Difference]: Start difference. First operand 10322 states and 15280 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 02:11:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:12,998 INFO L93 Difference]: Finished difference Result 17976 states and 26913 transitions. [2023-02-18 02:11:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 02:11:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2023-02-18 02:11:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:13,020 INFO L225 Difference]: With dead ends: 17976 [2023-02-18 02:11:13,020 INFO L226 Difference]: Without dead ends: 11085 [2023-02-18 02:11:13,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 02:11:13,033 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 506 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:13,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 721 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 02:11:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11085 states. [2023-02-18 02:11:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11085 to 10895. [2023-02-18 02:11:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10895 states, 7035 states have (on average 1.2565742714996446) internal successors, (8840), 7083 states have internal predecessors, (8840), 3405 states have call successors, (3405), 455 states have call predecessors, (3405), 454 states have return successors, (3393), 3356 states have call predecessors, (3393), 3393 states have call successors, (3393) [2023-02-18 02:11:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10895 states to 10895 states and 15638 transitions. [2023-02-18 02:11:21,124 INFO L78 Accepts]: Start accepts. Automaton has 10895 states and 15638 transitions. Word has length 106 [2023-02-18 02:11:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:21,124 INFO L495 AbstractCegarLoop]: Abstraction has 10895 states and 15638 transitions. [2023-02-18 02:11:21,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 02:11:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 10895 states and 15638 transitions. [2023-02-18 02:11:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-18 02:11:21,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:21,126 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:11:21,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:21,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 02:11:21,328 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1083254017, now seen corresponding path program 3 times [2023-02-18 02:11:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:21,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742467919] [2023-02-18 02:11:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:21,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:21,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664402793] [2023-02-18 02:11:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 02:11:21,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:21,335 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:11:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 02:11:21,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 02:11:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:11:21,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-18 02:11:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-18 02:11:21,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-18 02:11:23,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742467919] [2023-02-18 02:11:23,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664402793] [2023-02-18 02:11:23,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664402793] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:23,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:23,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2023-02-18 02:11:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836233173] [2023-02-18 02:11:23,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:23,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 02:11:23,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 02:11:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 02:11:23,487 INFO L87 Difference]: Start difference. First operand 10895 states and 15638 transitions. Second operand has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 02:12:09,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:12:42,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:12:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:12:46,216 INFO L93 Difference]: Finished difference Result 16733 states and 24325 transitions. [2023-02-18 02:12:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2023-02-18 02:12:46,217 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) Word has length 111 [2023-02-18 02:12:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:12:46,242 INFO L225 Difference]: With dead ends: 16733 [2023-02-18 02:12:46,242 INFO L226 Difference]: Without dead ends: 13696 [2023-02-18 02:12:46,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11281 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=5093, Invalid=24319, Unknown=0, NotChecked=0, Total=29412 [2023-02-18 02:12:46,251 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 1018 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 3431 mSolverCounterSat, 1496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1496 IncrementalHoareTripleChecker+Valid, 3431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.8s IncrementalHoareTripleChecker+Time [2023-02-18 02:12:46,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 2028 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1496 Valid, 3431 Invalid, 0 Unknown, 0 Unchecked, 43.8s Time] [2023-02-18 02:12:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13696 states. [2023-02-18 02:12:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13696 to 11163. [2023-02-18 02:12:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11163 states, 7229 states have (on average 1.2582653202379306) internal successors, (9096), 7282 states have internal predecessors, (9096), 3464 states have call successors, (3464), 470 states have call predecessors, (3464), 469 states have return successors, (3452), 3410 states have call predecessors, (3452), 3452 states have call successors, (3452) [2023-02-18 02:12:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11163 states to 11163 states and 16012 transitions. [2023-02-18 02:12:56,650 INFO L78 Accepts]: Start accepts. Automaton has 11163 states and 16012 transitions. Word has length 111 [2023-02-18 02:12:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:12:56,650 INFO L495 AbstractCegarLoop]: Abstraction has 11163 states and 16012 transitions. [2023-02-18 02:12:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 11 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 02:12:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 11163 states and 16012 transitions. [2023-02-18 02:12:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-18 02:12:56,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:12:56,652 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:12:56,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-18 02:12:56,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 02:12:56,857 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:12:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:12:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2079308725, now seen corresponding path program 4 times [2023-02-18 02:12:56,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:12:56,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202786350] [2023-02-18 02:12:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:12:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:12:56,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:12:56,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860920488] [2023-02-18 02:12:56,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 02:12:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:12:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:12:56,886 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:12:56,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 02:12:56,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 02:12:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:12:56,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 02:12:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:12:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-18 02:12:57,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:12:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-18 02:12:59,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:12:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202786350] [2023-02-18 02:12:59,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:12:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860920488] [2023-02-18 02:12:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860920488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:12:59,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:12:59,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-02-18 02:12:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574229116] [2023-02-18 02:12:59,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:12:59,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 02:12:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:12:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 02:12:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 02:12:59,941 INFO L87 Difference]: Start difference. First operand 11163 states and 16012 transitions. Second operand has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-18 02:13:11,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:13:55,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:14:01,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:14:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:19,209 INFO L93 Difference]: Finished difference Result 13388 states and 19235 transitions. [2023-02-18 02:14:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-18 02:14:19,210 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 111 [2023-02-18 02:14:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:19,267 INFO L225 Difference]: With dead ends: 13388 [2023-02-18 02:14:19,274 INFO L226 Difference]: Without dead ends: 13348 [2023-02-18 02:14:19,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6351 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=3107, Invalid=15525, Unknown=0, NotChecked=0, Total=18632 [2023-02-18 02:14:19,284 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 812 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 1022 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 3683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.8s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:19,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1374 Invalid, 3683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 2660 Invalid, 1 Unknown, 0 Unchecked, 42.8s Time] [2023-02-18 02:14:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2023-02-18 02:14:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 11395. [2023-02-18 02:14:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11395 states, 7397 states have (on average 1.2534811410031095) internal successors, (9272), 7450 states have internal predecessors, (9272), 3488 states have call successors, (3488), 510 states have call predecessors, (3488), 509 states have return successors, (3476), 3434 states have call predecessors, (3476), 3476 states have call successors, (3476) [2023-02-18 02:14:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11395 states to 11395 states and 16236 transitions. [2023-02-18 02:14:31,190 INFO L78 Accepts]: Start accepts. Automaton has 11395 states and 16236 transitions. Word has length 111 [2023-02-18 02:14:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:31,191 INFO L495 AbstractCegarLoop]: Abstraction has 11395 states and 16236 transitions. [2023-02-18 02:14:31,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-18 02:14:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11395 states and 16236 transitions. [2023-02-18 02:14:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-02-18 02:14:31,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:31,195 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:31,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-18 02:14:31,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:31,401 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1393531707, now seen corresponding path program 5 times [2023-02-18 02:14:31,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:31,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829216946] [2023-02-18 02:14:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:31,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:31,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:31,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412964772] [2023-02-18 02:14:31,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 02:14:31,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:31,408 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:14:31,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 02:14:31,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-18 02:14:31,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:14:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-18 02:14:31,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 34 proven. 98 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-02-18 02:14:31,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:14:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 34 proven. 98 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-02-18 02:14:36,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829216946] [2023-02-18 02:14:36,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412964772] [2023-02-18 02:14:36,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412964772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:14:36,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:14:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-02-18 02:14:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063084582] [2023-02-18 02:14:36,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:14:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 02:14:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 02:14:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-02-18 02:14:36,244 INFO L87 Difference]: Start difference. First operand 11395 states and 16236 transitions. Second operand has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-18 02:14:47,658 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 [] [2023-02-18 02:15:25,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:32,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:15:40,000 INFO L93 Difference]: Finished difference Result 13759 states and 19744 transitions. [2023-02-18 02:15:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-18 02:15:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) Word has length 127 [2023-02-18 02:15:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:15:40,026 INFO L225 Difference]: With dead ends: 13759 [2023-02-18 02:15:40,026 INFO L226 Difference]: Without dead ends: 13698 [2023-02-18 02:15:40,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1896, Invalid=8610, Unknown=0, NotChecked=0, Total=10506 [2023-02-18 02:15:40,030 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 412 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 754 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 3948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:15:40,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 1255 Invalid, 3948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 3192 Invalid, 2 Unknown, 0 Unchecked, 30.9s Time] [2023-02-18 02:15:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2023-02-18 02:15:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 12669. [2023-02-18 02:15:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12669 states, 8189 states have (on average 1.2526560019538404) internal successors, (10258), 8242 states have internal predecessors, (10258), 3932 states have call successors, (3932), 548 states have call predecessors, (3932), 547 states have return successors, (3920), 3878 states have call predecessors, (3920), 3920 states have call successors, (3920) [2023-02-18 02:15:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12669 states to 12669 states and 18110 transitions. [2023-02-18 02:15:54,086 INFO L78 Accepts]: Start accepts. Automaton has 12669 states and 18110 transitions. Word has length 127 [2023-02-18 02:15:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:15:54,086 INFO L495 AbstractCegarLoop]: Abstraction has 12669 states and 18110 transitions. [2023-02-18 02:15:54,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 12 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-18 02:15:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12669 states and 18110 transitions. [2023-02-18 02:15:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-18 02:15:54,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:15:54,096 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:15:54,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 02:15:54,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:15:54,301 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:15:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:15:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1649322963, now seen corresponding path program 2 times [2023-02-18 02:15:54,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:15:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720796606] [2023-02-18 02:15:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:15:54,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:15:54,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:15:54,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525822224] [2023-02-18 02:15:54,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:15:54,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:15:54,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:15:54,309 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:15:54,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 02:15:54,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:15:54,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:15:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 02:15:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:15:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-18 02:15:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:15:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-18 02:15:54,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:15:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720796606] [2023-02-18 02:15:54,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:15:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525822224] [2023-02-18 02:15:54,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525822224] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:15:54,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:15:54,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-02-18 02:15:54,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100901856] [2023-02-18 02:15:54,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:15:54,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 02:15:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:15:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 02:15:54,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 02:15:54,700 INFO L87 Difference]: Start difference. First operand 12669 states and 18110 transitions. Second operand has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-18 02:16:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:16:24,512 INFO L93 Difference]: Finished difference Result 25957 states and 38765 transitions. [2023-02-18 02:16:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-18 02:16:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 128 [2023-02-18 02:16:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:16:24,561 INFO L225 Difference]: With dead ends: 25957 [2023-02-18 02:16:24,561 INFO L226 Difference]: Without dead ends: 25915 [2023-02-18 02:16:24,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 02:16:24,568 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 873 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 02:16:24,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 788 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 02:16:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25915 states. [2023-02-18 02:16:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25915 to 25052. [2023-02-18 02:16:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25052 states, 16762 states have (on average 1.3192936403770432) internal successors, (22114), 17037 states have internal predecessors, (22114), 7466 states have call successors, (7466), 824 states have call predecessors, (7466), 823 states have return successors, (7446), 7190 states have call predecessors, (7446), 7446 states have call successors, (7446) [2023-02-18 02:16:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25052 states to 25052 states and 37026 transitions. [2023-02-18 02:16:52,821 INFO L78 Accepts]: Start accepts. Automaton has 25052 states and 37026 transitions. Word has length 128 [2023-02-18 02:16:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:16:52,822 INFO L495 AbstractCegarLoop]: Abstraction has 25052 states and 37026 transitions. [2023-02-18 02:16:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-18 02:16:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 25052 states and 37026 transitions. [2023-02-18 02:16:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-18 02:16:52,825 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:16:52,825 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:16:52,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 02:16:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:16:53,030 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:16:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:16:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash 209223717, now seen corresponding path program 6 times [2023-02-18 02:16:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:16:53,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984607842] [2023-02-18 02:16:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:16:53,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:16:53,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:16:53,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778577089] [2023-02-18 02:16:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 02:16:53,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:16:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:16:53,038 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:16:53,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 02:16:53,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 02:16:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:16:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-18 02:16:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:16:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 60 proven. 143 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2023-02-18 02:16:53,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:16:56,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:16:56,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984607842] [2023-02-18 02:16:56,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:16:56,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778577089] [2023-02-18 02:16:56,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778577089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:16:56,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:16:56,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 02:16:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375000839] [2023-02-18 02:16:56,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:16:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 02:16:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:16:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 02:16:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-02-18 02:16:56,318 INFO L87 Difference]: Start difference. First operand 25052 states and 37026 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-18 02:17:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:17:38,475 INFO L93 Difference]: Finished difference Result 32913 states and 49052 transitions. [2023-02-18 02:17:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 02:17:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 141 [2023-02-18 02:17:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:17:38,552 INFO L225 Difference]: With dead ends: 32913 [2023-02-18 02:17:38,552 INFO L226 Difference]: Without dead ends: 32849 [2023-02-18 02:17:38,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 02:17:38,563 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 201 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:17:38,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 760 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 02:17:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32849 states. [2023-02-18 02:18:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32849 to 31979. [2023-02-18 02:18:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31979 states, 20688 states have (on average 1.3333816705336428) internal successors, (27585), 21024 states have internal predecessors, (27585), 10234 states have call successors, (10234), 1057 states have call predecessors, (10234), 1056 states have return successors, (10214), 9897 states have call predecessors, (10214), 10214 states have call successors, (10214) [2023-02-18 02:18:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31979 states to 31979 states and 48033 transitions. [2023-02-18 02:18:18,010 INFO L78 Accepts]: Start accepts. Automaton has 31979 states and 48033 transitions. Word has length 141 [2023-02-18 02:18:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:18:18,010 INFO L495 AbstractCegarLoop]: Abstraction has 31979 states and 48033 transitions. [2023-02-18 02:18:18,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-18 02:18:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31979 states and 48033 transitions. [2023-02-18 02:18:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-18 02:18:18,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:18:18,015 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:18:18,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 02:18:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-18 02:18:18,220 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:18:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:18:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -131032317, now seen corresponding path program 3 times [2023-02-18 02:18:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:18:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291493866] [2023-02-18 02:18:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:18:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:18:18,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:18:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138039518] [2023-02-18 02:18:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 02:18:18,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:18:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:18:18,228 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:18:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 02:18:19,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 02:18:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:18:19,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 02:18:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:18:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 139 proven. 80 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-02-18 02:18:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:18:25,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:18:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291493866] [2023-02-18 02:18:25,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:18:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138039518] [2023-02-18 02:18:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138039518] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:18:25,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:18:25,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 02:18:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671278742] [2023-02-18 02:18:25,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:18:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 02:18:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:18:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 02:18:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 02:18:25,904 INFO L87 Difference]: Start difference. First operand 31979 states and 48033 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-18 02:19:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:19:11,789 INFO L93 Difference]: Finished difference Result 34765 states and 52074 transitions. [2023-02-18 02:19:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 02:19:11,790 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 144 [2023-02-18 02:19:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:19:11,856 INFO L225 Difference]: With dead ends: 34765 [2023-02-18 02:19:11,856 INFO L226 Difference]: Without dead ends: 34763 [2023-02-18 02:19:11,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 02:19:11,866 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 116 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:19:11,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 772 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-18 02:19:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34763 states. [2023-02-18 02:19:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34763 to 34329. [2023-02-18 02:19:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34329 states, 22089 states have (on average 1.3339218615600525) internal successors, (29465), 22445 states have internal predecessors, (29465), 11073 states have call successors, (11073), 1167 states have call predecessors, (11073), 1166 states have return successors, (11053), 10716 states have call predecessors, (11053), 11053 states have call successors, (11053) [2023-02-18 02:19:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34329 states to 34329 states and 51591 transitions. [2023-02-18 02:19:54,708 INFO L78 Accepts]: Start accepts. Automaton has 34329 states and 51591 transitions. Word has length 144 [2023-02-18 02:19:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:19:54,708 INFO L495 AbstractCegarLoop]: Abstraction has 34329 states and 51591 transitions. [2023-02-18 02:19:54,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-18 02:19:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 34329 states and 51591 transitions. [2023-02-18 02:19:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 02:19:54,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:19:54,728 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:19:54,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 02:19:54,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:19:54,940 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:19:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:19:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 336955412, now seen corresponding path program 7 times [2023-02-18 02:19:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:19:54,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901335573] [2023-02-18 02:19:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:19:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:19:54,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:19:54,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651080814] [2023-02-18 02:19:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 02:19:54,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:19:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:19:54,958 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:19:54,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 02:19:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:19:55,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 02:19:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:19:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 463 proven. 21 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-02-18 02:19:55,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:19:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 95 proven. 21 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2023-02-18 02:19:55,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:19:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901335573] [2023-02-18 02:19:55,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:19:55,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651080814] [2023-02-18 02:19:55,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651080814] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:19:55,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:19:55,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2023-02-18 02:19:55,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487044907] [2023-02-18 02:19:55,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:19:55,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 02:19:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:19:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 02:19:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-18 02:19:55,093 INFO L87 Difference]: Start difference. First operand 34329 states and 51591 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-02-18 02:20:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:20:42,273 INFO L93 Difference]: Finished difference Result 65265 states and 98638 transitions. [2023-02-18 02:20:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 02:20:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 150 [2023-02-18 02:20:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:20:42,350 INFO L225 Difference]: With dead ends: 65265 [2023-02-18 02:20:42,351 INFO L226 Difference]: Without dead ends: 39057 [2023-02-18 02:20:42,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:20:42,391 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 32 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:20:42,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 264 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:20:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39057 states. [2023-02-18 02:21:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39057 to 35245. [2023-02-18 02:21:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35245 states, 23093 states have (on average 1.3400597583683367) internal successors, (30946), 23736 states have internal predecessors, (30946), 11099 states have call successors, (11099), 1053 states have call predecessors, (11099), 1052 states have return successors, (11079), 10455 states have call predecessors, (11079), 11079 states have call successors, (11079) [2023-02-18 02:21:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35245 states to 35245 states and 53124 transitions. [2023-02-18 02:21:26,418 INFO L78 Accepts]: Start accepts. Automaton has 35245 states and 53124 transitions. Word has length 150 [2023-02-18 02:21:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:21:26,420 INFO L495 AbstractCegarLoop]: Abstraction has 35245 states and 53124 transitions. [2023-02-18 02:21:26,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-02-18 02:21:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 35245 states and 53124 transitions. [2023-02-18 02:21:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 02:21:26,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:21:26,423 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:21:26,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-18 02:21:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 02:21:26,628 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:21:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:21:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 155679393, now seen corresponding path program 4 times [2023-02-18 02:21:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:21:26,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419409059] [2023-02-18 02:21:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:21:26,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:21:26,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:21:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150255970] [2023-02-18 02:21:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 02:21:26,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:21:26,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:21:26,646 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 02:21:26,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 02:21:26,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 02:21:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:21:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-18 02:21:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:21:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 92 proven. 151 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-02-18 02:21:27,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:21:27,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:21:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419409059] [2023-02-18 02:21:27,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:21:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150255970] [2023-02-18 02:21:27,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150255970] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:21:27,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:21:27,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 02:21:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137051726] [2023-02-18 02:21:27,055 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:21:27,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 02:21:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:21:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 02:21:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-02-18 02:21:27,057 INFO L87 Difference]: Start difference. First operand 35245 states and 53124 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19)