./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-46.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/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_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-46.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/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_8c472738-ce4e-4f88-ae09-fe2f7660df7c/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 b28318b64c584c946b04c5086a6c24adb23afe0fc28f8c52df4df9b28156611e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:19,412 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:19,545 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:58:19,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:19,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:19,598 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:19,599 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:19,599 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:19,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:19,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:19,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:19,607 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:19,608 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:19,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:19,610 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:58:19,610 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:19,611 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:19,611 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:19,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:19,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:58:19,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:19,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:58:19,613 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:19,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:58:19,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:19,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:19,616 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:19,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:19,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:19,617 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:19,618 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:19,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:58:19,619 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:58:19,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:58:19,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:19,620 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:58:19,620 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:19,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:19,620 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:19,621 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_8c472738-ce4e-4f88-ae09-fe2f7660df7c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b28318b64c584c946b04c5086a6c24adb23afe0fc28f8c52df4df9b28156611e [2023-11-06 22:58:20,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:20,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:20,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:20,047 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:20,047 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:20,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-46.i [2023-11-06 22:58:23,100 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:23,476 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:23,476 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-46.i [2023-11-06 22:58:23,507 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/data/0103a9626/3e44ef38f90e4f7e8da86a1589d577c5/FLAG0106e773a [2023-11-06 22:58:23,524 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/data/0103a9626/3e44ef38f90e4f7e8da86a1589d577c5 [2023-11-06 22:58:23,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:23,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:23,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:23,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:23,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:23,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:23" (1/1) ... [2023-11-06 22:58:23,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c3ef6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:23, skipping insertion in model container [2023-11-06 22:58:23,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:23" (1/1) ... [2023-11-06 22:58:23,660 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:23,834 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_8c472738-ce4e-4f88-ae09-fe2f7660df7c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-46.i[916,929] [2023-11-06 22:58:24,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:24,051 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:58:24,065 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_8c472738-ce4e-4f88-ae09-fe2f7660df7c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-46.i[916,929] [2023-11-06 22:58:24,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:24,209 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:58:24,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24 WrapperNode [2023-11-06 22:58:24,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:24,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:24,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:58:24,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:58:24,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,254 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,366 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 416 [2023-11-06 22:58:24,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:24,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:58:24,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:58:24,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:58:24,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,448 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:58:24,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:58:24,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:58:24,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:58:24,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (1/1) ... [2023-11-06 22:58:24,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:24,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:24,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:24,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:58:24,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:58:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:58:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:58:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:58:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:58:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:58:24,758 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:58:24,760 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:58:25,733 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:58:25,744 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:58:25,744 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:58:25,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:25 BoogieIcfgContainer [2023-11-06 22:58:25,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:58:25,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:58:25,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:58:25,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:58:25,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:23" (1/3) ... [2023-11-06 22:58:25,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb031d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:25, skipping insertion in model container [2023-11-06 22:58:25,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:24" (2/3) ... [2023-11-06 22:58:25,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb031d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:25, skipping insertion in model container [2023-11-06 22:58:25,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:25" (3/3) ... [2023-11-06 22:58:25,761 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-46.i [2023-11-06 22:58:25,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:58:25,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:58:25,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:58:25,869 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;@4be34d36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:58:25,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:58:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 112 states have (on average 1.4375) internal successors, (161), 113 states have internal predecessors, (161), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 22:58:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:25,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:25,932 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:25,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:25,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash 198869991, now seen corresponding path program 1 times [2023-11-06 22:58:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:25,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453115054] [2023-11-06 22:58:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453115054] [2023-11-06 22:58:26,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:58:26,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173942917] [2023-11-06 22:58:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:26,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:26,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:26,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:58:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:26,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:58:26,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2023-11-06 22:58:27,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:27,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173942917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:27,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:27,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:58:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480435055] [2023-11-06 22:58:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:58:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:58:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:58:27,122 INFO L87 Difference]: Start difference. First operand has 171 states, 112 states have (on average 1.4375) internal successors, (161), 113 states have internal predecessors, (161), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-06 22:58:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:27,174 INFO L93 Difference]: Finished difference Result 335 states and 596 transitions. [2023-11-06 22:58:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:58:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) Word has length 365 [2023-11-06 22:58:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:27,188 INFO L225 Difference]: With dead ends: 335 [2023-11-06 22:58:27,188 INFO L226 Difference]: Without dead ends: 167 [2023-11-06 22:58:27,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 364 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 22:58:27,197 INFO L413 NwaCegarLoop]: 266 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, 266 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 22:58:27,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:58:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-06 22:58:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-06 22:58:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 109 states have (on average 1.4128440366972477) internal successors, (154), 109 states have internal predecessors, (154), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 22:58:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 266 transitions. [2023-11-06 22:58:27,270 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 266 transitions. Word has length 365 [2023-11-06 22:58:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:27,270 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 266 transitions. [2023-11-06 22:58:27,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-06 22:58:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 266 transitions. [2023-11-06 22:58:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:27,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:27,280 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:27,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:27,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:58:27,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:27,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:27,489 INFO L85 PathProgramCache]: Analyzing trace with hash -378314913, now seen corresponding path program 1 times [2023-11-06 22:58:27,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:27,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510275161] [2023-11-06 22:58:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:27,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:27,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424002433] [2023-11-06 22:58:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:27,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:27,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:27,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:58:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:27,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:58:28,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-06 22:58:28,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510275161] [2023-11-06 22:58:28,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424002433] [2023-11-06 22:58:28,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424002433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:28,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:28,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:58:28,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391384646] [2023-11-06 22:58:28,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:28,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:28,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:28,070 INFO L87 Difference]: Start difference. First operand 167 states and 266 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-06 22:58:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:28,142 INFO L93 Difference]: Finished difference Result 332 states and 531 transitions. [2023-11-06 22:58:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 365 [2023-11-06 22:58:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:28,157 INFO L225 Difference]: With dead ends: 332 [2023-11-06 22:58:28,158 INFO L226 Difference]: Without dead ends: 168 [2023-11-06 22:58:28,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 363 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 22:58:28,164 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 0 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:28,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:58:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-06 22:58:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-06 22:58:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.4090909090909092) internal successors, (155), 110 states have internal predecessors, (155), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 22:58:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 267 transitions. [2023-11-06 22:58:28,218 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 267 transitions. Word has length 365 [2023-11-06 22:58:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:28,222 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 267 transitions. [2023-11-06 22:58:28,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-06 22:58:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 267 transitions. [2023-11-06 22:58:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:28,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:28,235 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:28,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:28,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:28,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash -887788003, now seen corresponding path program 1 times [2023-11-06 22:58:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:28,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638766718] [2023-11-06 22:58:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:28,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:28,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602723506] [2023-11-06 22:58:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:28,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:28,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:28,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:28,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:58:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:28,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:58:28,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-06 22:58:29,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638766718] [2023-11-06 22:58:29,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602723506] [2023-11-06 22:58:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602723506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:29,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:29,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:58:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657817369] [2023-11-06 22:58:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:29,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:58:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:58:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:58:29,031 INFO L87 Difference]: Start difference. First operand 168 states and 267 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-06 22:58:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:29,176 INFO L93 Difference]: Finished difference Result 496 states and 792 transitions. [2023-11-06 22:58:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:58:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 365 [2023-11-06 22:58:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:29,182 INFO L225 Difference]: With dead ends: 496 [2023-11-06 22:58:29,182 INFO L226 Difference]: Without dead ends: 331 [2023-11-06 22:58:29,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 362 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 22:58:29,184 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 248 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:29,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1207 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:58:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-06 22:58:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 186. [2023-11-06 22:58:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 128 states have (on average 1.4375) internal successors, (184), 128 states have internal predecessors, (184), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 22:58:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 296 transitions. [2023-11-06 22:58:29,228 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 296 transitions. Word has length 365 [2023-11-06 22:58:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:29,230 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 296 transitions. [2023-11-06 22:58:29,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-06 22:58:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 296 transitions. [2023-11-06 22:58:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:29,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:29,238 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:29,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:29,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:29,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:29,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1357791451, now seen corresponding path program 1 times [2023-11-06 22:58:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:29,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963590012] [2023-11-06 22:58:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:29,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283483349] [2023-11-06 22:58:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:29,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:29,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:29,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:58:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:29,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:58:29,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3025 proven. 66 refuted. 0 times theorem prover too weak. 3069 trivial. 0 not checked. [2023-11-06 22:58:30,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 99 proven. 66 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-06 22:58:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963590012] [2023-11-06 22:58:30,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283483349] [2023-11-06 22:58:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283483349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:30,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:58:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200515713] [2023-11-06 22:58:30,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:30,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:58:30,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:30,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:58:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:58:30,696 INFO L87 Difference]: Start difference. First operand 186 states and 296 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-06 22:58:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:31,115 INFO L93 Difference]: Finished difference Result 377 states and 596 transitions. [2023-11-06 22:58:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:58:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 365 [2023-11-06 22:58:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:31,120 INFO L225 Difference]: With dead ends: 377 [2023-11-06 22:58:31,120 INFO L226 Difference]: Without dead ends: 194 [2023-11-06 22:58:31,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 722 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 22:58:31,126 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 142 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:31,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 495 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:58:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-06 22:58:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2023-11-06 22:58:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 131 states have internal predecessors, (186), 56 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 22:58:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 298 transitions. [2023-11-06 22:58:31,174 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 298 transitions. Word has length 365 [2023-11-06 22:58:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:31,175 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 298 transitions. [2023-11-06 22:58:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-06 22:58:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 298 transitions. [2023-11-06 22:58:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:31,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:31,182 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:31,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:31,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:31,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:31,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash -230556451, now seen corresponding path program 1 times [2023-11-06 22:58:31,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:31,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863090182] [2023-11-06 22:58:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:31,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:31,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21456116] [2023-11-06 22:58:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:31,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:31,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:31,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:58:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:31,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:31,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2583 proven. 117 refuted. 0 times theorem prover too weak. 3460 trivial. 0 not checked. [2023-11-06 22:58:32,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-06 22:58:32,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:32,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863090182] [2023-11-06 22:58:32,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21456116] [2023-11-06 22:58:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21456116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:32,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:32,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:58:32,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44422415] [2023-11-06 22:58:32,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:32,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:58:32,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:58:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:58:32,733 INFO L87 Difference]: Start difference. First operand 190 states and 298 transitions. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 3 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 3 states have call predecessors, (96), 3 states have call successors, (96) [2023-11-06 22:58:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:33,588 INFO L93 Difference]: Finished difference Result 506 states and 780 transitions. [2023-11-06 22:58:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:58:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 3 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 3 states have call predecessors, (96), 3 states have call successors, (96) Word has length 365 [2023-11-06 22:58:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:33,593 INFO L225 Difference]: With dead ends: 506 [2023-11-06 22:58:33,594 INFO L226 Difference]: Without dead ends: 319 [2023-11-06 22:58:33,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 721 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:58:33,596 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 342 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 938 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:58:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-06 22:58:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 308. [2023-11-06 22:58:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 225 states have (on average 1.4133333333333333) internal successors, (318), 226 states have internal predecessors, (318), 77 states have call successors, (77), 5 states have call predecessors, (77), 5 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-06 22:58:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 472 transitions. [2023-11-06 22:58:33,635 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 472 transitions. Word has length 365 [2023-11-06 22:58:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:33,637 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 472 transitions. [2023-11-06 22:58:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 3 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 3 states have call predecessors, (96), 3 states have call successors, (96) [2023-11-06 22:58:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 472 transitions. [2023-11-06 22:58:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:33,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:33,646 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:33,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:33,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:33,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:33,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -890087973, now seen corresponding path program 1 times [2023-11-06 22:58:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:33,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733490109] [2023-11-06 22:58:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:33,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:33,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:33,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873575631] [2023-11-06 22:58:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:33,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:33,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:58:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:34,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:58:34,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2829 proven. 108 refuted. 0 times theorem prover too weak. 3223 trivial. 0 not checked. [2023-11-06 22:58:34,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 57 proven. 108 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-06 22:58:34,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:34,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733490109] [2023-11-06 22:58:34,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873575631] [2023-11-06 22:58:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873575631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:34,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:34,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:58:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192770131] [2023-11-06 22:58:34,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:58:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:58:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:34,865 INFO L87 Difference]: Start difference. First operand 308 states and 472 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2023-11-06 22:58:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:35,279 INFO L93 Difference]: Finished difference Result 625 states and 951 transitions. [2023-11-06 22:58:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:58:35,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 365 [2023-11-06 22:58:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:35,286 INFO L225 Difference]: With dead ends: 625 [2023-11-06 22:58:35,286 INFO L226 Difference]: Without dead ends: 320 [2023-11-06 22:58:35,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 722 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 22:58:35,288 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 387 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:35,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 491 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:58:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-06 22:58:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 316. [2023-11-06 22:58:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 231 states have (on average 1.393939393939394) internal successors, (322), 232 states have internal predecessors, (322), 77 states have call successors, (77), 7 states have call predecessors, (77), 7 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-06 22:58:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 476 transitions. [2023-11-06 22:58:35,337 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 476 transitions. Word has length 365 [2023-11-06 22:58:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:35,339 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 476 transitions. [2023-11-06 22:58:35,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2023-11-06 22:58:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 476 transitions. [2023-11-06 22:58:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:35,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:35,348 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:35,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:35,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:35,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -466441251, now seen corresponding path program 1 times [2023-11-06 22:58:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:35,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689920340] [2023-11-06 22:58:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:35,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558880755] [2023-11-06 22:58:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:35,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:35,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:35,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:58:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:36,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:58:36,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3079 proven. 186 refuted. 0 times theorem prover too weak. 2895 trivial. 0 not checked. [2023-11-06 22:58:37,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 138 proven. 189 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2023-11-06 22:58:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689920340] [2023-11-06 22:58:38,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558880755] [2023-11-06 22:58:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558880755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:38,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:38,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-06 22:58:38,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867967683] [2023-11-06 22:58:38,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:38,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:58:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:58:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:58:38,358 INFO L87 Difference]: Start difference. First operand 316 states and 476 transitions. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 6 states have call successors, (112), 4 states have call predecessors, (112), 7 states have return successors, (112), 6 states have call predecessors, (112), 6 states have call successors, (112) [2023-11-06 22:58:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:41,477 INFO L93 Difference]: Finished difference Result 1358 states and 2022 transitions. [2023-11-06 22:58:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:58:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 6 states have call successors, (112), 4 states have call predecessors, (112), 7 states have return successors, (112), 6 states have call predecessors, (112), 6 states have call successors, (112) Word has length 365 [2023-11-06 22:58:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:41,487 INFO L225 Difference]: With dead ends: 1358 [2023-11-06 22:58:41,487 INFO L226 Difference]: Without dead ends: 1033 [2023-11-06 22:58:41,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=853, Invalid=2117, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 22:58:41,491 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 2421 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 1233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2421 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1233 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:41,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2421 Valid, 1031 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1233 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:58:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2023-11-06 22:58:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 825. [2023-11-06 22:58:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 617 states have (on average 1.3792544570502432) internal successors, (851), 621 states have internal predecessors, (851), 185 states have call successors, (185), 22 states have call predecessors, (185), 22 states have return successors, (185), 181 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-06 22:58:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1221 transitions. [2023-11-06 22:58:41,609 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1221 transitions. Word has length 365 [2023-11-06 22:58:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:41,610 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1221 transitions. [2023-11-06 22:58:41,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 6 states have call successors, (112), 4 states have call predecessors, (112), 7 states have return successors, (112), 6 states have call predecessors, (112), 6 states have call successors, (112) [2023-11-06 22:58:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1221 transitions. [2023-11-06 22:58:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:41,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:41,615 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:41,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:41,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:41,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1178717027, now seen corresponding path program 1 times [2023-11-06 22:58:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:41,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426084336] [2023-11-06 22:58:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:41,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:41,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608522284] [2023-11-06 22:58:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:41,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:41,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:41,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:58:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:42,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:58:42,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2863 proven. 57 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2023-11-06 22:58:44,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 108 proven. 57 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-06 22:58:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426084336] [2023-11-06 22:58:45,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:45,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608522284] [2023-11-06 22:58:45,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608522284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:45,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:45,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:58:45,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260480181] [2023-11-06 22:58:45,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:58:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:58:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:58:45,576 INFO L87 Difference]: Start difference. First operand 825 states and 1221 transitions. Second operand has 14 states, 14 states have (on average 10.0) internal successors, (140), 14 states have internal predecessors, (140), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-06 22:58:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:47,496 INFO L93 Difference]: Finished difference Result 1957 states and 2929 transitions. [2023-11-06 22:58:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:58:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.0) internal successors, (140), 14 states have internal predecessors, (140), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) Word has length 365 [2023-11-06 22:58:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:47,507 INFO L225 Difference]: With dead ends: 1957 [2023-11-06 22:58:47,507 INFO L226 Difference]: Without dead ends: 1258 [2023-11-06 22:58:47,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:58:47,511 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1071 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:47,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1088 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:58:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-11-06 22:58:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 829. [2023-11-06 22:58:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 620 states have (on average 1.3758064516129032) internal successors, (853), 624 states have internal predecessors, (853), 185 states have call successors, (185), 23 states have call predecessors, (185), 23 states have return successors, (185), 181 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-06 22:58:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1223 transitions. [2023-11-06 22:58:47,659 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1223 transitions. Word has length 365 [2023-11-06 22:58:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:47,660 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1223 transitions. [2023-11-06 22:58:47,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.0) internal successors, (140), 14 states have internal predecessors, (140), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-06 22:58:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1223 transitions. [2023-11-06 22:58:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:58:47,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:47,664 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:47,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:47,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:47,882 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:47,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1187977567, now seen corresponding path program 1 times [2023-11-06 22:58:47,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887398217] [2023-11-06 22:58:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195484365] [2023-11-06 22:58:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:47,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:47,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:58:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:58,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:58:58,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 4679 proven. 411 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-11-06 22:59:01,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 363 proven. 279 refuted. 0 times theorem prover too weak. 5518 trivial. 0 not checked. [2023-11-06 22:59:10,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:10,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887398217] [2023-11-06 22:59:10,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:10,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195484365] [2023-11-06 22:59:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195484365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:10,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:10,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2023-11-06 22:59:10,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642591241] [2023-11-06 22:59:10,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:10,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:59:10,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:10,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:59:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:59:10,824 INFO L87 Difference]: Start difference. First operand 829 states and 1223 transitions. Second operand has 37 states, 36 states have (on average 5.305555555555555) internal successors, (191), 34 states have internal predecessors, (191), 12 states have call successors, (101), 7 states have call predecessors, (101), 15 states have return successors, (102), 12 states have call predecessors, (102), 12 states have call successors, (102) [2023-11-06 22:59:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:25,729 INFO L93 Difference]: Finished difference Result 2572 states and 3635 transitions. [2023-11-06 22:59:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-06 22:59:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.305555555555555) internal successors, (191), 34 states have internal predecessors, (191), 12 states have call successors, (101), 7 states have call predecessors, (101), 15 states have return successors, (102), 12 states have call predecessors, (102), 12 states have call successors, (102) Word has length 365 [2023-11-06 22:59:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:25,746 INFO L225 Difference]: With dead ends: 2572 [2023-11-06 22:59:25,746 INFO L226 Difference]: Without dead ends: 2020 [2023-11-06 22:59:25,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 701 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2633, Invalid=7873, Unknown=0, NotChecked=0, Total=10506 [2023-11-06 22:59:25,753 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 918 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:25,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 1510 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-06 22:59:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2023-11-06 22:59:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1529. [2023-11-06 22:59:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1177 states have (on average 1.3687340696686492) internal successors, (1611), 1182 states have internal predecessors, (1611), 281 states have call successors, (281), 70 states have call predecessors, (281), 70 states have return successors, (281), 276 states have call predecessors, (281), 281 states have call successors, (281) [2023-11-06 22:59:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2173 transitions. [2023-11-06 22:59:26,065 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2173 transitions. Word has length 365 [2023-11-06 22:59:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:26,066 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2173 transitions. [2023-11-06 22:59:26,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.305555555555555) internal successors, (191), 34 states have internal predecessors, (191), 12 states have call successors, (101), 7 states have call predecessors, (101), 15 states have return successors, (102), 12 states have call predecessors, (102), 12 states have call successors, (102) [2023-11-06 22:59:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2173 transitions. [2023-11-06 22:59:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-11-06 22:59:26,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:26,071 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:26,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:26,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:26,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:26,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1889577441, now seen corresponding path program 1 times [2023-11-06 22:59:26,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:26,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496601134] [2023-11-06 22:59:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:26,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:26,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867535068] [2023-11-06 22:59:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:26,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:26,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:59:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:26,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:59:26,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2323 proven. 39 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2023-11-06 22:59:27,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 126 proven. 39 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-06 22:59:28,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:28,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496601134] [2023-11-06 22:59:28,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:28,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867535068] [2023-11-06 22:59:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867535068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:28,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:28,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-06 22:59:28,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846839050] [2023-11-06 22:59:28,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:28,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:59:28,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:59:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:59:28,855 INFO L87 Difference]: Start difference. First operand 1529 states and 2173 transitions. Second operand has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-06 22:59:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:43,550 INFO L93 Difference]: Finished difference Result 13415 states and 18909 transitions. [2023-11-06 22:59:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-06 22:59:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) Word has length 365 [2023-11-06 22:59:43,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:43,638 INFO L225 Difference]: With dead ends: 13415 [2023-11-06 22:59:43,638 INFO L226 Difference]: Without dead ends: 11513 [2023-11-06 22:59:43,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 714 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5662 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2872, Invalid=11408, Unknown=0, NotChecked=0, Total=14280 [2023-11-06 22:59:43,654 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 5605 mSDsluCounter, 3913 mSDsCounter, 0 mSdLazyCounter, 3949 mSolverCounterSat, 2125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5701 SdHoareTripleChecker+Valid, 4462 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2125 IncrementalHoareTripleChecker+Valid, 3949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:43,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5701 Valid, 4462 Invalid, 6074 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2125 Valid, 3949 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-06 22:59:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11513 states. [2023-11-06 22:59:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11513 to 5032. [2023-11-06 22:59:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5032 states, 3911 states have (on average 1.3610329838915878) internal successors, (5323), 3935 states have internal predecessors, (5323), 876 states have call successors, (876), 244 states have call predecessors, (876), 244 states have return successors, (876), 852 states have call predecessors, (876), 876 states have call successors, (876) [2023-11-06 22:59:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5032 states to 5032 states and 7075 transitions. [2023-11-06 22:59:45,405 INFO L78 Accepts]: Start accepts. Automaton has 5032 states and 7075 transitions. Word has length 365 [2023-11-06 22:59:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:45,406 INFO L495 AbstractCegarLoop]: Abstraction has 5032 states and 7075 transitions. [2023-11-06 22:59:45,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.541666666666667) internal successors, (157), 24 states have internal predecessors, (157), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-06 22:59:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5032 states and 7075 transitions. [2023-11-06 22:59:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2023-11-06 22:59:45,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:45,411 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:59:45,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 22:59:45,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:59:45,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:59:45,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash 827304218, now seen corresponding path program 1 times [2023-11-06 22:59:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:45,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666906536] [2023-11-06 22:59:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:45,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:45,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:59:45,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733570069] [2023-11-06 22:59:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:45,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:45,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c472738-ce4e-4f88-ae09-fe2f7660df7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process