./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-46.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-46.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP --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 df69ef27b04a763c9eae25d4c49e492a4abf0cf87271d0ce91cfba82e7749765 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:09:56,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:09:56,473 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:09:56,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:09:56,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:09:56,520 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:09:56,521 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:09:56,522 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:09:56,524 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:09:56,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:09:56,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:09:56,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:09:56,534 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:09:56,536 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:09:56,536 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:09:56,537 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:09:56,537 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:09:56,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:09:56,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:09:56,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:09:56,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:09:56,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:09:56,540 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:09:56,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:09:56,541 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:09:56,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:09:56,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:09:56,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:09:56,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:09:56,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:09:56,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:09:56,545 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:09:56,545 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:09:56,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:09:56,546 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:09:56,546 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:09:56,546 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:09:56,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:09:56,547 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:09:56,547 INFO L153 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df69ef27b04a763c9eae25d4c49e492a4abf0cf87271d0ce91cfba82e7749765 [2023-11-06 22:09:56,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:09:56,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:09:56,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:09:56,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:09:56,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:09:56,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-46.i [2023-11-06 22:09:59,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:10:00,298 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:10:00,300 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-46.i [2023-11-06 22:10:00,326 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/data/0188795d2/c458664655784f45adfc55732518bfc5/FLAG3d36d7fd4 [2023-11-06 22:10:00,341 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/data/0188795d2/c458664655784f45adfc55732518bfc5 [2023-11-06 22:10:00,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:10:00,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:10:00,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:00,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:10:00,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:10:00,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:00" (1/1) ... [2023-11-06 22:10:00,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59556ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:00, skipping insertion in model container [2023-11-06 22:10:00,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:00" (1/1) ... [2023-11-06 22:10:00,428 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:10:00,615 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-46.i[916,929] [2023-11-06 22:10:00,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:00,995 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:10:01,006 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-46.i[916,929] [2023-11-06 22:10:01,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:01,210 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:10:01,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01 WrapperNode [2023-11-06 22:10:01,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:01,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:01,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:10:01,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:10:01,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,507 INFO L138 Inliner]: procedures = 26, calls = 88, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 728 [2023-11-06 22:10:01,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:01,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:10:01,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:10:01,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:10:01,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,617 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,670 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:10:01,671 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:10:01,671 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:10:01,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:10:01,672 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (1/1) ... [2023-11-06 22:10:01,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:01,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:10:01,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:10:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:10:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:10:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:10:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:10:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:10:01,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:10:01,905 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:10:01,907 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:10:03,525 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:10:03,543 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:10:03,543 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:10:03,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:03 BoogieIcfgContainer [2023-11-06 22:10:03,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:10:03,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:10:03,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:10:03,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:10:03,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:00" (1/3) ... [2023-11-06 22:10:03,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1bf67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:03, skipping insertion in model container [2023-11-06 22:10:03,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:01" (2/3) ... [2023-11-06 22:10:03,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1bf67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:03, skipping insertion in model container [2023-11-06 22:10:03,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:03" (3/3) ... [2023-11-06 22:10:03,560 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-46.i [2023-11-06 22:10:03,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:10:03,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:10:03,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:10:03,670 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;@71853589, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:10:03,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:10:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 289 states, 211 states have (on average 1.5545023696682465) internal successors, (328), 212 states have internal predecessors, (328), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-06 22:10:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:10:03,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:03,736 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:03,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:03,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash 24609959, now seen corresponding path program 1 times [2023-11-06 22:10:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:03,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859183307] [2023-11-06 22:10:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:04,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:04,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859183307] [2023-11-06 22:10:04,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:10:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786685771] [2023-11-06 22:10:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:04,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:04,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:04,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:10:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:04,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:10:04,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2023-11-06 22:10:04,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:04,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786685771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:04,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:04,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:10:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499289356] [2023-11-06 22:10:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:04,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:10:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:10:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:10:05,006 INFO L87 Difference]: Start difference. First operand has 289 states, 211 states have (on average 1.5545023696682465) internal successors, (328), 212 states have internal predecessors, (328), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (75), 2 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 2 states have call successors, (75) [2023-11-06 22:10:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:05,087 INFO L93 Difference]: Finished difference Result 571 states and 1025 transitions. [2023-11-06 22:10:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:10:05,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (75), 2 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 2 states have call successors, (75) Word has length 520 [2023-11-06 22:10:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:05,101 INFO L225 Difference]: With dead ends: 571 [2023-11-06 22:10:05,102 INFO L226 Difference]: Without dead ends: 285 [2023-11-06 22:10:05,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:10:05,112 INFO L413 NwaCegarLoop]: 471 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, 471 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 [2023-11-06 22:10:05,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:10:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-06 22:10:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2023-11-06 22:10:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 208 states have (on average 1.5432692307692308) internal successors, (321), 208 states have internal predecessors, (321), 75 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-06 22:10:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 471 transitions. [2023-11-06 22:10:05,222 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 471 transitions. Word has length 520 [2023-11-06 22:10:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:05,223 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 471 transitions. [2023-11-06 22:10:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (75), 2 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 2 states have call successors, (75) [2023-11-06 22:10:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 471 transitions. [2023-11-06 22:10:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:10:05,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:05,247 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:05,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:10:05,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:05,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 735528561, now seen corresponding path program 1 times [2023-11-06 22:10:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:05,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892044721] [2023-11-06 22:10:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:05,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:05,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702362084] [2023-11-06 22:10:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:05,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:05,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:05,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:10:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:06,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:10:06,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:06,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:06,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892044721] [2023-11-06 22:10:06,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:06,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702362084] [2023-11-06 22:10:06,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702362084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:06,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:06,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:10:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855116469] [2023-11-06 22:10:06,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:06,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:06,306 INFO L87 Difference]: Start difference. First operand 285 states and 471 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:06,542 INFO L93 Difference]: Finished difference Result 849 states and 1407 transitions. [2023-11-06 22:10:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:10:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 520 [2023-11-06 22:10:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:06,561 INFO L225 Difference]: With dead ends: 849 [2023-11-06 22:10:06,561 INFO L226 Difference]: Without dead ends: 567 [2023-11-06 22:10:06,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:06,565 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 451 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:06,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 894 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:10:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-11-06 22:10:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 564. [2023-11-06 22:10:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 411 states have (on average 1.5450121654501217) internal successors, (635), 411 states have internal predecessors, (635), 150 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-06 22:10:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 935 transitions. [2023-11-06 22:10:06,724 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 935 transitions. Word has length 520 [2023-11-06 22:10:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:06,727 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 935 transitions. [2023-11-06 22:10:06,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 935 transitions. [2023-11-06 22:10:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:10:06,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:06,747 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:06,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:06,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:06,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:06,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1129895347, now seen corresponding path program 1 times [2023-11-06 22:10:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:06,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195208448] [2023-11-06 22:10:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:06,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:07,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:07,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127723914] [2023-11-06 22:10:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:07,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:07,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:07,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:07,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:10:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:07,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:10:07,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:07,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:07,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195208448] [2023-11-06 22:10:07,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127723914] [2023-11-06 22:10:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127723914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:07,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:07,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:10:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198924486] [2023-11-06 22:10:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:07,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:07,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:07,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:07,818 INFO L87 Difference]: Start difference. First operand 564 states and 935 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:07,990 INFO L93 Difference]: Finished difference Result 1680 states and 2787 transitions. [2023-11-06 22:10:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:10:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 520 [2023-11-06 22:10:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:08,002 INFO L225 Difference]: With dead ends: 1680 [2023-11-06 22:10:08,002 INFO L226 Difference]: Without dead ends: 1119 [2023-11-06 22:10:08,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:08,006 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 410 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:08,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 917 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2023-11-06 22:10:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 713. [2023-11-06 22:10:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 560 states have (on average 1.5964285714285715) internal successors, (894), 560 states have internal predecessors, (894), 150 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-06 22:10:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1194 transitions. [2023-11-06 22:10:08,123 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1194 transitions. Word has length 520 [2023-11-06 22:10:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1194 transitions. [2023-11-06 22:10:08,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1194 transitions. [2023-11-06 22:10:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:10:08,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:08,141 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:08,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:08,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:08,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:08,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1685308347, now seen corresponding path program 1 times [2023-11-06 22:10:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:08,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638149861] [2023-11-06 22:10:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:08,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:08,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:08,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388177877] [2023-11-06 22:10:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:08,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:08,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:08,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:10:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:08,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:09,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:09,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638149861] [2023-11-06 22:10:09,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388177877] [2023-11-06 22:10:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388177877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:09,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:09,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:10:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042593218] [2023-11-06 22:10:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:10:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:10:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:10:09,055 INFO L87 Difference]: Start difference. First operand 713 states and 1194 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:09,517 INFO L93 Difference]: Finished difference Result 2526 states and 4178 transitions. [2023-11-06 22:10:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:10:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 520 [2023-11-06 22:10:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:09,533 INFO L225 Difference]: With dead ends: 2526 [2023-11-06 22:10:09,533 INFO L226 Difference]: Without dead ends: 1816 [2023-11-06 22:10:09,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:10:09,537 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 1178 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:09,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 2157 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:10:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2023-11-06 22:10:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1174. [2023-11-06 22:10:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 943 states have (on average 1.5906680805938493) internal successors, (1500), 945 states have internal predecessors, (1500), 226 states have call successors, (226), 4 states have call predecessors, (226), 4 states have return successors, (226), 224 states have call predecessors, (226), 226 states have call successors, (226) [2023-11-06 22:10:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1952 transitions. [2023-11-06 22:10:09,829 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1952 transitions. Word has length 520 [2023-11-06 22:10:09,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:09,830 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1952 transitions. [2023-11-06 22:10:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1952 transitions. [2023-11-06 22:10:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-06 22:10:09,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:09,850 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:09,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:10,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:10,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1430967499, now seen corresponding path program 1 times [2023-11-06 22:10:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040544167] [2023-11-06 22:10:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:10,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:10,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158802513] [2023-11-06 22:10:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:10,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:10,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:10,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:10:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:10,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:10,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 2202 proven. 198 refuted. 0 times theorem prover too weak. 8700 trivial. 0 not checked. [2023-11-06 22:10:11,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-06 22:10:12,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:12,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040544167] [2023-11-06 22:10:12,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:12,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158802513] [2023-11-06 22:10:12,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158802513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:12,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:10:12,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279716113] [2023-11-06 22:10:12,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:12,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:10:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:10:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:10:12,044 INFO L87 Difference]: Start difference. First operand 1174 states and 1952 transitions. Second operand has 8 states, 8 states have (on average 29.25) internal successors, (234), 8 states have internal predecessors, (234), 3 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 3 states have call predecessors, (142), 3 states have call successors, (142) [2023-11-06 22:10:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:12,722 INFO L93 Difference]: Finished difference Result 2369 states and 3921 transitions. [2023-11-06 22:10:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:10:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.25) internal successors, (234), 8 states have internal predecessors, (234), 3 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 3 states have call predecessors, (142), 3 states have call successors, (142) Word has length 520 [2023-11-06 22:10:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:12,734 INFO L225 Difference]: With dead ends: 2369 [2023-11-06 22:10:12,734 INFO L226 Difference]: Without dead ends: 1198 [2023-11-06 22:10:12,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1032 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:10:12,739 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 489 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:12,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 962 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:10:12,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-11-06 22:10:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1190. [2023-11-06 22:10:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 955 states have (on average 1.5727748691099477) internal successors, (1502), 957 states have internal predecessors, (1502), 226 states have call successors, (226), 8 states have call predecessors, (226), 8 states have return successors, (226), 224 states have call predecessors, (226), 226 states have call successors, (226) [2023-11-06 22:10:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1954 transitions. [2023-11-06 22:10:12,901 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1954 transitions. Word has length 520 [2023-11-06 22:10:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:12,903 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1954 transitions. [2023-11-06 22:10:12,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.25) internal successors, (234), 8 states have internal predecessors, (234), 3 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 3 states have call predecessors, (142), 3 states have call successors, (142) [2023-11-06 22:10:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1954 transitions. [2023-11-06 22:10:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-06 22:10:12,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:12,910 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:12,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:13,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:13,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1432176170, now seen corresponding path program 1 times [2023-11-06 22:10:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:13,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541224955] [2023-11-06 22:10:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:13,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:13,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:13,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490308044] [2023-11-06 22:10:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:13,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:13,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:13,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:10:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:13,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 1328 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:13,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5622 proven. 108 refuted. 0 times theorem prover too weak. 5370 trivial. 0 not checked. [2023-11-06 22:10:14,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 114 proven. 108 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-06 22:10:14,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541224955] [2023-11-06 22:10:14,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490308044] [2023-11-06 22:10:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490308044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:14,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:14,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:10:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299563744] [2023-11-06 22:10:14,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:14,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:10:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:10:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:10:14,597 INFO L87 Difference]: Start difference. First operand 1190 states and 1954 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-06 22:10:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:15,281 INFO L93 Difference]: Finished difference Result 1916 states and 3143 transitions. [2023-11-06 22:10:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:10:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) Word has length 521 [2023-11-06 22:10:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:15,289 INFO L225 Difference]: With dead ends: 1916 [2023-11-06 22:10:15,289 INFO L226 Difference]: Without dead ends: 729 [2023-11-06 22:10:15,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1034 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:15,295 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 585 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 974 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:10:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-11-06 22:10:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 725. [2023-11-06 22:10:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 568 states have (on average 1.5528169014084507) internal successors, (882), 568 states have internal predecessors, (882), 150 states have call successors, (150), 6 states have call predecessors, (150), 6 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-06 22:10:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1182 transitions. [2023-11-06 22:10:15,391 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1182 transitions. Word has length 521 [2023-11-06 22:10:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:15,393 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1182 transitions. [2023-11-06 22:10:15,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-06 22:10:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1182 transitions. [2023-11-06 22:10:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-06 22:10:15,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:15,399 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:15,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:15,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:15,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 68894938, now seen corresponding path program 1 times [2023-11-06 22:10:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235675658] [2023-11-06 22:10:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:15,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396172907] [2023-11-06 22:10:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:15,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:15,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:15,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:10:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:16,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:10:16,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:16,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235675658] [2023-11-06 22:10:16,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:16,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396172907] [2023-11-06 22:10:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396172907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:16,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:16,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:10:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228989325] [2023-11-06 22:10:16,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:10:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:10:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:10:16,333 INFO L87 Difference]: Start difference. First operand 725 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:16,835 INFO L93 Difference]: Finished difference Result 2101 states and 3432 transitions. [2023-11-06 22:10:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:10:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 522 [2023-11-06 22:10:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:16,847 INFO L225 Difference]: With dead ends: 2101 [2023-11-06 22:10:16,847 INFO L226 Difference]: Without dead ends: 1379 [2023-11-06 22:10:16,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:10:16,851 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 662 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:16,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1081 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:10:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2023-11-06 22:10:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 931. [2023-11-06 22:10:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 774 states have (on average 1.5891472868217054) internal successors, (1230), 774 states have internal predecessors, (1230), 150 states have call successors, (150), 6 states have call predecessors, (150), 6 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-06 22:10:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1530 transitions. [2023-11-06 22:10:17,015 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1530 transitions. Word has length 522 [2023-11-06 22:10:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:17,016 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1530 transitions. [2023-11-06 22:10:17,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1530 transitions. [2023-11-06 22:10:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-06 22:10:17,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:17,022 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:17,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:17,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:17,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:17,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2008056984, now seen corresponding path program 1 times [2023-11-06 22:10:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907082013] [2023-11-06 22:10:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:17,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434649572] [2023-11-06 22:10:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:17,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:17,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:17,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:17,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:10:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:17,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:10:17,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:18,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:18,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907082013] [2023-11-06 22:10:18,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434649572] [2023-11-06 22:10:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434649572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:18,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:18,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:10:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020887430] [2023-11-06 22:10:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:10:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:10:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:10:18,683 INFO L87 Difference]: Start difference. First operand 931 states and 1530 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:20,428 INFO L93 Difference]: Finished difference Result 4537 states and 7436 transitions. [2023-11-06 22:10:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:10:20,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 522 [2023-11-06 22:10:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:20,453 INFO L225 Difference]: With dead ends: 4537 [2023-11-06 22:10:20,453 INFO L226 Difference]: Without dead ends: 3609 [2023-11-06 22:10:20,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:10:20,457 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 1679 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:20,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1679 Valid, 1940 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:10:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2023-11-06 22:10:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2751. [2023-11-06 22:10:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2296 states have (on average 1.5818815331010454) internal successors, (3632), 2298 states have internal predecessors, (3632), 432 states have call successors, (432), 22 states have call predecessors, (432), 22 states have return successors, (432), 430 states have call predecessors, (432), 432 states have call successors, (432) [2023-11-06 22:10:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4496 transitions. [2023-11-06 22:10:20,801 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4496 transitions. Word has length 522 [2023-11-06 22:10:20,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:20,802 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4496 transitions. [2023-11-06 22:10:20,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4496 transitions. [2023-11-06 22:10:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-11-06 22:10:20,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:20,811 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2023-11-06 22:10:20,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:21,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:10:21,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:21,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2084957782, now seen corresponding path program 1 times [2023-11-06 22:10:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:21,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098324990] [2023-11-06 22:10:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:21,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073704874] [2023-11-06 22:10:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:21,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:21,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:21,115 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:10:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:21,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:10:21,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:23,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:23,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098324990] [2023-11-06 22:10:23,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:23,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073704874] [2023-11-06 22:10:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073704874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:10:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901480691] [2023-11-06 22:10:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:23,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:10:23,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:10:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:10:23,170 INFO L87 Difference]: Start difference. First operand 2751 states and 4496 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:24,132 INFO L93 Difference]: Finished difference Result 8579 states and 14045 transitions. [2023-11-06 22:10:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:10:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 522 [2023-11-06 22:10:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:24,169 INFO L225 Difference]: With dead ends: 8579 [2023-11-06 22:10:24,170 INFO L226 Difference]: Without dead ends: 5831 [2023-11-06 22:10:24,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:10:24,177 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 568 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:24,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 2010 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:10:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2023-11-06 22:10:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 4567. [2023-11-06 22:10:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 3814 states have (on average 1.5778710015731516) internal successors, (6018), 3818 states have internal predecessors, (6018), 714 states have call successors, (714), 38 states have call predecessors, (714), 38 states have return successors, (714), 710 states have call predecessors, (714), 714 states have call successors, (714) [2023-11-06 22:10:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 7446 transitions. [2023-11-06 22:10:24,609 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 7446 transitions. Word has length 522 [2023-11-06 22:10:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:24,611 INFO L495 AbstractCegarLoop]: Abstraction has 4567 states and 7446 transitions. [2023-11-06 22:10:24,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 7446 transitions. [2023-11-06 22:10:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-06 22:10:24,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:24,622 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2023-11-06 22:10:24,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:10:24,831 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:24,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 159478764, now seen corresponding path program 1 times [2023-11-06 22:10:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061653267] [2023-11-06 22:10:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:24,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:24,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258780424] [2023-11-06 22:10:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:24,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:24,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:24,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:25,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:10:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:25,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:25,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 1592 proven. 15 refuted. 0 times theorem prover too weak. 9493 trivial. 0 not checked. [2023-11-06 22:10:25,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 207 proven. 15 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-06 22:10:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061653267] [2023-11-06 22:10:25,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258780424] [2023-11-06 22:10:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258780424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:25,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:25,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:10:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341951174] [2023-11-06 22:10:25,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:25,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:10:25,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:10:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:10:25,985 INFO L87 Difference]: Start difference. First operand 4567 states and 7446 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-06 22:10:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:26,794 INFO L93 Difference]: Finished difference Result 9203 states and 14955 transitions. [2023-11-06 22:10:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:10:26,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 523 [2023-11-06 22:10:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:26,833 INFO L225 Difference]: With dead ends: 9203 [2023-11-06 22:10:26,833 INFO L226 Difference]: Without dead ends: 4639 [2023-11-06 22:10:26,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1038 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:26,843 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 354 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:26,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 976 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:10:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2023-11-06 22:10:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 4591. [2023-11-06 22:10:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 3832 states have (on average 1.5673277661795406) internal successors, (6006), 3836 states have internal predecessors, (6006), 714 states have call successors, (714), 44 states have call predecessors, (714), 44 states have return successors, (714), 710 states have call predecessors, (714), 714 states have call successors, (714) [2023-11-06 22:10:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 7434 transitions. [2023-11-06 22:10:27,390 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 7434 transitions. Word has length 523 [2023-11-06 22:10:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:27,391 INFO L495 AbstractCegarLoop]: Abstraction has 4591 states and 7434 transitions. [2023-11-06 22:10:27,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (80), 2 states have call predecessors, (80), 4 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2023-11-06 22:10:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 7434 transitions. [2023-11-06 22:10:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-06 22:10:27,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:27,408 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2023-11-06 22:10:27,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:27,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:10:27,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:27,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 186544366, now seen corresponding path program 1 times [2023-11-06 22:10:27,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251184267] [2023-11-06 22:10:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:27,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978623162] [2023-11-06 22:10:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:27,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:27,719 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:27,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:10:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:28,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:28,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5624 proven. 111 refuted. 0 times theorem prover too weak. 5365 trivial. 0 not checked. [2023-11-06 22:10:28,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 111 proven. 111 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-06 22:10:29,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:29,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251184267] [2023-11-06 22:10:29,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:29,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978623162] [2023-11-06 22:10:29,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978623162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:29,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:29,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:10:29,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371847330] [2023-11-06 22:10:29,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:29,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:10:29,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:10:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:10:29,080 INFO L87 Difference]: Start difference. First operand 4591 states and 7434 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-06 22:10:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:30,006 INFO L93 Difference]: Finished difference Result 9277 states and 14943 transitions. [2023-11-06 22:10:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:10:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 523 [2023-11-06 22:10:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:30,038 INFO L225 Difference]: With dead ends: 9277 [2023-11-06 22:10:30,038 INFO L226 Difference]: Without dead ends: 4689 [2023-11-06 22:10:30,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1038 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:30,048 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 806 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:30,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 953 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:10:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2023-11-06 22:10:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 4621. [2023-11-06 22:10:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 3852 states have (on average 1.5332294911734163) internal successors, (5906), 3856 states have internal predecessors, (5906), 714 states have call successors, (714), 54 states have call predecessors, (714), 54 states have return successors, (714), 710 states have call predecessors, (714), 714 states have call successors, (714) [2023-11-06 22:10:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 7334 transitions. [2023-11-06 22:10:30,531 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 7334 transitions. Word has length 523 [2023-11-06 22:10:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:30,532 INFO L495 AbstractCegarLoop]: Abstraction has 4621 states and 7334 transitions. [2023-11-06 22:10:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-06 22:10:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 7334 transitions. [2023-11-06 22:10:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-06 22:10:30,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:30,543 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2023-11-06 22:10:30,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:10:30,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:30,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1849249300, now seen corresponding path program 1 times [2023-11-06 22:10:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573707341] [2023-11-06 22:10:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:30,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123232782] [2023-11-06 22:10:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:30,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:30,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:30,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:30,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:10:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:31,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:10:31,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:32,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573707341] [2023-11-06 22:10:32,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123232782] [2023-11-06 22:10:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123232782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:32,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:32,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:10:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484997927] [2023-11-06 22:10:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:32,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:10:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:10:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:10:32,852 INFO L87 Difference]: Start difference. First operand 4621 states and 7334 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:33,951 INFO L93 Difference]: Finished difference Result 16471 states and 26308 transitions. [2023-11-06 22:10:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:10:33,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 523 [2023-11-06 22:10:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:33,983 INFO L225 Difference]: With dead ends: 16471 [2023-11-06 22:10:33,983 INFO L226 Difference]: Without dead ends: 11853 [2023-11-06 22:10:33,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:10:33,996 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 1064 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:33,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 2407 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:10:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11853 states. [2023-11-06 22:10:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11853 to 7397. [2023-11-06 22:10:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7397 states, 6164 states have (on average 1.5139519792342635) internal successors, (9332), 6170 states have internal predecessors, (9332), 1146 states have call successors, (1146), 86 states have call predecessors, (1146), 86 states have return successors, (1146), 1140 states have call predecessors, (1146), 1146 states have call successors, (1146) [2023-11-06 22:10:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7397 states to 7397 states and 11624 transitions. [2023-11-06 22:10:34,828 INFO L78 Accepts]: Start accepts. Automaton has 7397 states and 11624 transitions. Word has length 523 [2023-11-06 22:10:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:34,829 INFO L495 AbstractCegarLoop]: Abstraction has 7397 states and 11624 transitions. [2023-11-06 22:10:34,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 5 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7397 states and 11624 transitions. [2023-11-06 22:10:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-06 22:10:34,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:34,843 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2023-11-06 22:10:34,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:35,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:10:35,052 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:35,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1451024298, now seen corresponding path program 1 times [2023-11-06 22:10:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874798756] [2023-11-06 22:10:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:35,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:35,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144561551] [2023-11-06 22:10:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:35,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:35,133 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:35,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:10:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:35,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:10:35,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:36,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:36,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:36,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874798756] [2023-11-06 22:10:36,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:36,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144561551] [2023-11-06 22:10:36,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144561551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:36,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:36,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:10:36,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301225123] [2023-11-06 22:10:36,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:36,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:10:36,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:10:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:10:36,336 INFO L87 Difference]: Start difference. First operand 7397 states and 11624 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:38,468 INFO L93 Difference]: Finished difference Result 24378 states and 38517 transitions. [2023-11-06 22:10:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:10:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 523 [2023-11-06 22:10:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:38,512 INFO L225 Difference]: With dead ends: 24378 [2023-11-06 22:10:38,513 INFO L226 Difference]: Without dead ends: 15994 [2023-11-06 22:10:38,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:38,530 INFO L413 NwaCegarLoop]: 1037 mSDtfsCounter, 2102 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:38,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2102 Valid, 2885 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:10:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15994 states. [2023-11-06 22:10:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15994 to 10751. [2023-11-06 22:10:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 9054 states have (on average 1.4983432736911861) internal successors, (13566), 9062 states have internal predecessors, (13566), 1578 states have call successors, (1578), 118 states have call predecessors, (1578), 118 states have return successors, (1578), 1570 states have call predecessors, (1578), 1578 states have call successors, (1578) [2023-11-06 22:10:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 16722 transitions. [2023-11-06 22:10:40,318 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 16722 transitions. Word has length 523 [2023-11-06 22:10:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:40,320 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 16722 transitions. [2023-11-06 22:10:40,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 16722 transitions. [2023-11-06 22:10:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-06 22:10:40,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:40,343 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2023-11-06 22:10:40,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:10:40,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:40,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1220105174, now seen corresponding path program 1 times [2023-11-06 22:10:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:40,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830386124] [2023-11-06 22:10:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:40,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239876460] [2023-11-06 22:10:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:40,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:40,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:40,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:10:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:41,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:10:41,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11100 trivial. 0 not checked. [2023-11-06 22:10:41,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:10:41,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:41,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830386124] [2023-11-06 22:10:41,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:41,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239876460] [2023-11-06 22:10:41,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239876460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:41,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:41,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:10:41,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918924420] [2023-11-06 22:10:41,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:10:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:41,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:10:41,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:10:41,950 INFO L87 Difference]: Start difference. First operand 10751 states and 16722 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:43,764 INFO L93 Difference]: Finished difference Result 25665 states and 39760 transitions. [2023-11-06 22:10:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:10:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) Word has length 523 [2023-11-06 22:10:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:43,800 INFO L225 Difference]: With dead ends: 25665 [2023-11-06 22:10:43,801 INFO L226 Difference]: Without dead ends: 14917 [2023-11-06 22:10:43,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:10:43,823 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1752 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:43,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1752 Valid, 994 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:10:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14917 states. [2023-11-06 22:10:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14917 to 7301. [2023-11-06 22:10:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7301 states, 6064 states have (on average 1.4468997361477574) internal successors, (8774), 6070 states have internal predecessors, (8774), 1146 states have call successors, (1146), 90 states have call predecessors, (1146), 90 states have return successors, (1146), 1140 states have call predecessors, (1146), 1146 states have call successors, (1146) [2023-11-06 22:10:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 11066 transitions. [2023-11-06 22:10:44,874 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 11066 transitions. Word has length 523 [2023-11-06 22:10:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:44,875 INFO L495 AbstractCegarLoop]: Abstraction has 7301 states and 11066 transitions. [2023-11-06 22:10:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 1 states have call successors, (75), 1 states have call predecessors, (75), 1 states have return successors, (75), 1 states have call predecessors, (75), 1 states have call successors, (75) [2023-11-06 22:10:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 11066 transitions. [2023-11-06 22:10:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-11-06 22:10:44,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:44,888 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1] [2023-11-06 22:10:44,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:45,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:10:45,097 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:45,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2066480598, now seen corresponding path program 1 times [2023-11-06 22:10:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:45,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544909558] [2023-11-06 22:10:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:45,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:45,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141859328] [2023-11-06 22:10:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:45,192 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:45,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:10:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:45,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:45,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 3984 proven. 171 refuted. 0 times theorem prover too weak. 6945 trivial. 0 not checked. [2023-11-06 22:10:46,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 51 proven. 171 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-06 22:10:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544909558] [2023-11-06 22:10:46,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141859328] [2023-11-06 22:10:46,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141859328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:46,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:46,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:10:46,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735651952] [2023-11-06 22:10:46,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:46,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:10:46,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:10:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:10:46,988 INFO L87 Difference]: Start difference. First operand 7301 states and 11066 transitions. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 3 states have call successors, (132), 2 states have call predecessors, (132), 4 states have return successors, (133), 3 states have call predecessors, (133), 3 states have call successors, (133) [2023-11-06 22:10:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:48,122 INFO L93 Difference]: Finished difference Result 14779 states and 22293 transitions. [2023-11-06 22:10:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:10:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 3 states have call successors, (132), 2 states have call predecessors, (132), 4 states have return successors, (133), 3 states have call predecessors, (133), 3 states have call successors, (133) Word has length 523 [2023-11-06 22:10:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:48,149 INFO L225 Difference]: With dead ends: 14779 [2023-11-06 22:10:48,149 INFO L226 Difference]: Without dead ends: 7481 [2023-11-06 22:10:48,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1038 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:10:48,166 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 279 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:48,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 927 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:10:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2023-11-06 22:10:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 7365. [2023-11-06 22:10:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 6112 states have (on average 1.43815445026178) internal successors, (8790), 6118 states have internal predecessors, (8790), 1146 states have call successors, (1146), 106 states have call predecessors, (1146), 106 states have return successors, (1146), 1140 states have call predecessors, (1146), 1146 states have call successors, (1146) [2023-11-06 22:10:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 11082 transitions. [2023-11-06 22:10:49,089 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 11082 transitions. Word has length 523 [2023-11-06 22:10:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:49,090 INFO L495 AbstractCegarLoop]: Abstraction has 7365 states and 11082 transitions. [2023-11-06 22:10:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 3 states have call successors, (132), 2 states have call predecessors, (132), 4 states have return successors, (133), 3 states have call predecessors, (133), 3 states have call successors, (133) [2023-11-06 22:10:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 11082 transitions. [2023-11-06 22:10:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-11-06 22:10:49,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:49,102 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1] [2023-11-06 22:10:49,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:49,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:10:49,312 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:49,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:49,312 INFO L85 PathProgramCache]: Analyzing trace with hash 89938219, now seen corresponding path program 1 times [2023-11-06 22:10:49,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:49,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462113207] [2023-11-06 22:10:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:49,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:49,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109442880] [2023-11-06 22:10:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:49,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:49,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:49,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:49,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:10:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:50,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:10:50,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 3902 proven. 48 refuted. 0 times theorem prover too weak. 7150 trivial. 0 not checked. [2023-11-06 22:10:51,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 174 proven. 48 refuted. 0 times theorem prover too weak. 10878 trivial. 0 not checked. [2023-11-06 22:10:51,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:51,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462113207] [2023-11-06 22:10:51,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:10:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109442880] [2023-11-06 22:10:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109442880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:51,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:51,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-06 22:10:51,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412944221] [2023-11-06 22:10:51,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:51,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:10:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:10:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:51,572 INFO L87 Difference]: Start difference. First operand 7365 states and 11082 transitions. Second operand has 11 states, 11 states have (on average 23.818181818181817) internal successors, (262), 11 states have internal predecessors, (262), 4 states have call successors, (150), 3 states have call predecessors, (150), 5 states have return successors, (150), 4 states have call predecessors, (150), 4 states have call successors, (150) [2023-11-06 22:10:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:54,881 INFO L93 Difference]: Finished difference Result 23651 states and 35430 transitions. [2023-11-06 22:10:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:10:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.818181818181817) internal successors, (262), 11 states have internal predecessors, (262), 4 states have call successors, (150), 3 states have call predecessors, (150), 5 states have return successors, (150), 4 states have call predecessors, (150), 4 states have call successors, (150) Word has length 524 [2023-11-06 22:10:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:54,916 INFO L225 Difference]: With dead ends: 23651 [2023-11-06 22:10:54,916 INFO L226 Difference]: Without dead ends: 16289 [2023-11-06 22:10:54,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:10:54,929 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 1342 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:54,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 2035 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 22:10:54,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16289 states. [2023-11-06 22:10:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16289 to 16115. [2023-11-06 22:10:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16115 states, 13204 states have (on average 1.4211602544683428) internal successors, (18765), 13229 states have internal predecessors, (18765), 2647 states have call successors, (2647), 263 states have call predecessors, (2647), 263 states have return successors, (2647), 2622 states have call predecessors, (2647), 2647 states have call successors, (2647) [2023-11-06 22:10:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16115 states to 16115 states and 24059 transitions. [2023-11-06 22:10:56,531 INFO L78 Accepts]: Start accepts. Automaton has 16115 states and 24059 transitions. Word has length 524 [2023-11-06 22:10:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:56,533 INFO L495 AbstractCegarLoop]: Abstraction has 16115 states and 24059 transitions. [2023-11-06 22:10:56,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.818181818181817) internal successors, (262), 11 states have internal predecessors, (262), 4 states have call successors, (150), 3 states have call predecessors, (150), 5 states have return successors, (150), 4 states have call predecessors, (150), 4 states have call successors, (150) [2023-11-06 22:10:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 16115 states and 24059 transitions. [2023-11-06 22:10:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:10:56,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:56,545 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1] [2023-11-06 22:10:56,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:56,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:10:56,755 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:56,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash -480274275, now seen corresponding path program 1 times [2023-11-06 22:10:56,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:56,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341784381] [2023-11-06 22:10:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:56,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:56,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:10:56,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912708656] [2023-11-06 22:10:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:56,835 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:56,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:10:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:57,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:10:57,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 2597 proven. 570 refuted. 0 times theorem prover too weak. 7933 trivial. 0 not checked. [2023-11-06 22:11:02,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 54 proven. 387 refuted. 0 times theorem prover too weak. 10659 trivial. 0 not checked. [2023-11-06 22:11:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341784381] [2023-11-06 22:11:03,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:11:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912708656] [2023-11-06 22:11:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912708656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:03,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:11:03,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-11-06 22:11:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088463477] [2023-11-06 22:11:03,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:03,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:11:03,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:11:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:11:03,496 INFO L87 Difference]: Start difference. First operand 16115 states and 24059 transitions. Second operand has 24 states, 23 states have (on average 13.478260869565217) internal successors, (310), 22 states have internal predecessors, (310), 8 states have call successors, (150), 5 states have call predecessors, (150), 9 states have return successors, (150), 8 states have call predecessors, (150), 8 states have call successors, (150) [2023-11-06 22:11:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:16,407 INFO L93 Difference]: Finished difference Result 60785 states and 90017 transitions. [2023-11-06 22:11:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-06 22:11:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 13.478260869565217) internal successors, (310), 22 states have internal predecessors, (310), 8 states have call successors, (150), 5 states have call predecessors, (150), 9 states have return successors, (150), 8 states have call predecessors, (150), 8 states have call successors, (150) Word has length 525 [2023-11-06 22:11:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:16,492 INFO L225 Difference]: With dead ends: 60785 [2023-11-06 22:11:16,492 INFO L226 Difference]: Without dead ends: 44673 [2023-11-06 22:11:16,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1974, Invalid=5166, Unknown=0, NotChecked=0, Total=7140 [2023-11-06 22:11:16,517 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 5590 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 1768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5625 SdHoareTripleChecker+Valid, 5860 SdHoareTripleChecker+Invalid, 6090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1768 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:16,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5625 Valid, 5860 Invalid, 6090 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1768 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-06 22:11:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44673 states. [2023-11-06 22:11:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44673 to 35824. [2023-11-06 22:11:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35824 states, 29893 states have (on average 1.4325092831097581) internal successors, (42822), 29984 states have internal predecessors, (42822), 5281 states have call successors, (5281), 649 states have call predecessors, (5281), 649 states have return successors, (5281), 5190 states have call predecessors, (5281), 5281 states have call successors, (5281) [2023-11-06 22:11:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35824 states to 35824 states and 53384 transitions. [2023-11-06 22:11:20,714 INFO L78 Accepts]: Start accepts. Automaton has 35824 states and 53384 transitions. Word has length 525 [2023-11-06 22:11:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:20,715 INFO L495 AbstractCegarLoop]: Abstraction has 35824 states and 53384 transitions. [2023-11-06 22:11:20,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 13.478260869565217) internal successors, (310), 22 states have internal predecessors, (310), 8 states have call successors, (150), 5 states have call predecessors, (150), 9 states have return successors, (150), 8 states have call predecessors, (150), 8 states have call successors, (150) [2023-11-06 22:11:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 35824 states and 53384 transitions. [2023-11-06 22:11:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:11:20,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:20,730 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1] [2023-11-06 22:11:20,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:20,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:11:20,940 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:20,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1297922725, now seen corresponding path program 1 times [2023-11-06 22:11:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:20,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978467397] [2023-11-06 22:11:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:21,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:11:21,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586524014] [2023-11-06 22:11:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:21,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:21,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:21,138 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:21,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:11:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:21,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:11:21,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 7796 proven. 690 refuted. 0 times theorem prover too weak. 2614 trivial. 0 not checked. [2023-11-06 22:11:25,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:32,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:32,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978467397] [2023-11-06 22:11:32,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:11:32,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586524014] [2023-11-06 22:11:32,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586524014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:32,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:11:32,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-06 22:11:32,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641877256] [2023-11-06 22:11:32,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:32,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:11:32,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:11:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:11:32,076 INFO L87 Difference]: Start difference. First operand 35824 states and 53384 transitions. Second operand has 20 states, 20 states have (on average 9.0) internal successors, (180), 17 states have internal predecessors, (180), 7 states have call successors, (75), 7 states have call predecessors, (75), 10 states have return successors, (75), 7 states have call predecessors, (75), 7 states have call successors, (75) [2023-11-06 22:11:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:38,019 INFO L93 Difference]: Finished difference Result 73651 states and 108417 transitions. [2023-11-06 22:11:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:11:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.0) internal successors, (180), 17 states have internal predecessors, (180), 7 states have call successors, (75), 7 states have call predecessors, (75), 10 states have return successors, (75), 7 states have call predecessors, (75), 7 states have call successors, (75) Word has length 525 [2023-11-06 22:11:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:38,096 INFO L225 Difference]: With dead ends: 73651 [2023-11-06 22:11:38,096 INFO L226 Difference]: Without dead ends: 37830 [2023-11-06 22:11:38,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=522, Invalid=1038, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:11:38,139 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 446 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:38,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2162 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:11:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37830 states. [2023-11-06 22:11:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37830 to 33530. [2023-11-06 22:11:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33530 states, 27632 states have (on average 1.4001158077591198) internal successors, (38688), 27680 states have internal predecessors, (38688), 4937 states have call successors, (4937), 960 states have call predecessors, (4937), 960 states have return successors, (4937), 4889 states have call predecessors, (4937), 4937 states have call successors, (4937) [2023-11-06 22:11:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33530 states to 33530 states and 48562 transitions. [2023-11-06 22:11:42,368 INFO L78 Accepts]: Start accepts. Automaton has 33530 states and 48562 transitions. Word has length 525 [2023-11-06 22:11:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:42,369 INFO L495 AbstractCegarLoop]: Abstraction has 33530 states and 48562 transitions. [2023-11-06 22:11:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.0) internal successors, (180), 17 states have internal predecessors, (180), 7 states have call successors, (75), 7 states have call predecessors, (75), 10 states have return successors, (75), 7 states have call predecessors, (75), 7 states have call successors, (75) [2023-11-06 22:11:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33530 states and 48562 transitions. [2023-11-06 22:11:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-11-06 22:11:42,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:42,383 INFO L195 NwaCegarLoop]: trace histogram [75, 75, 75, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1] [2023-11-06 22:11:42,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:42,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:11:42,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:42,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1257247975, now seen corresponding path program 1 times [2023-11-06 22:11:42,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:42,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533070335] [2023-11-06 22:11:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:42,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:42,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:11:42,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736040179] [2023-11-06 22:11:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:42,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:42,688 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:42,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f0f1034-3050-421a-85e0-1933c907686f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:11:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:43,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:11:43,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 8323 proven. 552 refuted. 0 times theorem prover too weak. 2225 trivial. 0 not checked. [2023-11-06 22:11:48,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533070335] [2023-11-06 22:13:35,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:13:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736040179] [2023-11-06 22:13:35,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736040179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:35,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:13:35,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-06 22:13:35,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150270048] [2023-11-06 22:13:35,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:35,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:13:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:13:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=792, Unknown=12, NotChecked=0, Total=1122 [2023-11-06 22:13:35,892 INFO L87 Difference]: Start difference. First operand 33530 states and 48562 transitions. Second operand has 20 states, 20 states have (on average 9.0) internal successors, (180), 18 states have internal predecessors, (180), 6 states have call successors, (75), 6 states have call predecessors, (75), 10 states have return successors, (75), 6 states have call predecessors, (75), 6 states have call successors, (75)