./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-34.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_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/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_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/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_4363c71f-efa5-4e9b-8252-71647859b4a0/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 f39f68f55c90deb8496cdc58f18787083a238252dfdfe92f73d39acb627ae3ba --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:33,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:33,417 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:57:33,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:33,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:33,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:33,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:33,492 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:33,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:33,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:33,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:33,502 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:33,502 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:33,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:33,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:33,503 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:33,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:33,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:33,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:33,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:33,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:33,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:33,506 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:33,506 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:33,507 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:33,507 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:33,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:33,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:33,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:33,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:33,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:33,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:33,510 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:33,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:33,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:33,511 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:33,511 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:33,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:33,511 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:33,512 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_4363c71f-efa5-4e9b-8252-71647859b4a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f39f68f55c90deb8496cdc58f18787083a238252dfdfe92f73d39acb627ae3ba [2023-11-06 21:57:33,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:33,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:33,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:33,935 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:33,936 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:33,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-34.i [2023-11-06 21:57:37,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:37,288 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:37,289 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-34.i [2023-11-06 21:57:37,300 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/data/fb2a7451c/667a04cc378244db8edeba0eeb46103d/FLAG3fd5b357f [2023-11-06 21:57:37,319 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/data/fb2a7451c/667a04cc378244db8edeba0eeb46103d [2023-11-06 21:57:37,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:37,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:37,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:37,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:37,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:37,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd93a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37, skipping insertion in model container [2023-11-06 21:57:37,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,388 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:37,572 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_4363c71f-efa5-4e9b-8252-71647859b4a0/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-34.i[917,930] [2023-11-06 21:57:37,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:37,668 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:37,682 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_4363c71f-efa5-4e9b-8252-71647859b4a0/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-34.i[917,930] [2023-11-06 21:57:37,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:37,733 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:37,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37 WrapperNode [2023-11-06 21:57:37,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:37,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:37,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:37,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:37,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,757 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,820 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 198 [2023-11-06 21:57:37,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:37,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:37,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:37,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:37,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:37,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:37,872 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:37,872 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:37,873 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (1/1) ... [2023-11-06 21:57:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:37,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:37,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:37,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:37,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:57:37,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:57:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:37,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:38,081 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:38,084 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:38,664 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:38,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:38,672 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:57:38,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:38 BoogieIcfgContainer [2023-11-06 21:57:38,675 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:38,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:38,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:38,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:38,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:37" (1/3) ... [2023-11-06 21:57:38,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31203c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:38, skipping insertion in model container [2023-11-06 21:57:38,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:37" (2/3) ... [2023-11-06 21:57:38,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31203c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:38, skipping insertion in model container [2023-11-06 21:57:38,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:38" (3/3) ... [2023-11-06 21:57:38,686 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_steplocals_file-34.i [2023-11-06 21:57:38,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:38,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:57:38,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:57:38,779 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;@1d6f7ffe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:57:38,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:57:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 60 states have (on average 1.45) internal successors, (87), 61 states have internal predecessors, (87), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-06 21:57:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 21:57:38,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:38,812 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:38,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:38,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 14551032, now seen corresponding path program 1 times [2023-11-06 21:57:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860378405] [2023-11-06 21:57:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:39,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860378405] [2023-11-06 21:57:39,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:57:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081447791] [2023-11-06 21:57:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:39,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:39,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:39,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:39,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:57:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:39,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:57:39,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2023-11-06 21:57:39,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:39,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081447791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:39,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:39,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964762934] [2023-11-06 21:57:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:39,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:57:39,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:39,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:57:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:57:39,574 INFO L87 Difference]: Start difference. First operand has 90 states, 60 states have (on average 1.45) internal successors, (87), 61 states have internal predecessors, (87), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-06 21:57:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:39,621 INFO L93 Difference]: Finished difference Result 173 states and 303 transitions. [2023-11-06 21:57:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:57:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) Word has length 173 [2023-11-06 21:57:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:39,635 INFO L225 Difference]: With dead ends: 173 [2023-11-06 21:57:39,638 INFO L226 Difference]: Without dead ends: 86 [2023-11-06 21:57:39,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 172 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 21:57:39,655 INFO L413 NwaCegarLoop]: 134 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, 134 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 21:57:39,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-06 21:57:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-06 21:57:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 57 states have internal predecessors, (80), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-06 21:57:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 134 transitions. [2023-11-06 21:57:39,772 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 134 transitions. Word has length 173 [2023-11-06 21:57:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:39,774 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 134 transitions. [2023-11-06 21:57:39,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-06 21:57:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 134 transitions. [2023-11-06 21:57:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 21:57:39,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:39,786 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:39,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:57:39,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:39,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash -778211466, now seen corresponding path program 1 times [2023-11-06 21:57:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316068629] [2023-11-06 21:57:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:40,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891975089] [2023-11-06 21:57:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:40,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:40,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:57:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:40,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:57:40,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:57:40,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:40,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316068629] [2023-11-06 21:57:40,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891975089] [2023-11-06 21:57:40,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891975089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:40,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:40,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788455608] [2023-11-06 21:57:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:40,438 INFO L87 Difference]: Start difference. First operand 86 states and 134 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:40,485 INFO L93 Difference]: Finished difference Result 206 states and 322 transitions. [2023-11-06 21:57:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:40,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2023-11-06 21:57:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:40,490 INFO L225 Difference]: With dead ends: 206 [2023-11-06 21:57:40,490 INFO L226 Difference]: Without dead ends: 123 [2023-11-06 21:57:40,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 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 21:57:40,493 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 51 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:40,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 260 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-06 21:57:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2023-11-06 21:57:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 63 states have internal predecessors, (89), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-06 21:57:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2023-11-06 21:57:40,512 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 143 transitions. Word has length 173 [2023-11-06 21:57:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:40,515 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 143 transitions. [2023-11-06 21:57:40,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 143 transitions. [2023-11-06 21:57:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 21:57:40,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:40,519 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:40,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:40,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:40,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:40,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2058075144, now seen corresponding path program 1 times [2023-11-06 21:57:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:40,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524336724] [2023-11-06 21:57:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:40,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262357985] [2023-11-06 21:57:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:40,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:40,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:40,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:40,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:57:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:41,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 21:57:41,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 783 proven. 63 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-11-06 21:57:44,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:57:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524336724] [2023-11-06 21:57:45,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262357985] [2023-11-06 21:57:45,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262357985] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:57:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [22] total 33 [2023-11-06 21:57:45,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552248666] [2023-11-06 21:57:45,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:45,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:57:45,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:45,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:57:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:57:45,772 INFO L87 Difference]: Start difference. First operand 92 states and 143 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:48,308 INFO L93 Difference]: Finished difference Result 376 states and 569 transitions. [2023-11-06 21:57:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 21:57:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2023-11-06 21:57:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:48,315 INFO L225 Difference]: With dead ends: 376 [2023-11-06 21:57:48,316 INFO L226 Difference]: Without dead ends: 287 [2023-11-06 21:57:48,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=521, Invalid=2449, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 21:57:48,332 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 595 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:48,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 948 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:57:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-06 21:57:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 106. [2023-11-06 21:57:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 77 states have internal predecessors, (110), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-06 21:57:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 164 transitions. [2023-11-06 21:57:48,373 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 164 transitions. Word has length 173 [2023-11-06 21:57:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:48,375 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 164 transitions. [2023-11-06 21:57:48,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 164 transitions. [2023-11-06 21:57:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 21:57:48,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:48,379 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:48,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:48,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:48,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:48,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:48,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1535827574, now seen corresponding path program 1 times [2023-11-06 21:57:48,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078575606] [2023-11-06 21:57:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:48,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:48,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538147084] [2023-11-06 21:57:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:48,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:48,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:57:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:48,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:57:48,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 744 proven. 51 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-11-06 21:57:50,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:57:51,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:51,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078575606] [2023-11-06 21:57:51,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538147084] [2023-11-06 21:57:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538147084] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:51,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:57:51,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 26 [2023-11-06 21:57:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005590886] [2023-11-06 21:57:51,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:57:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:51,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:57:51,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:57:51,825 INFO L87 Difference]: Start difference. First operand 106 states and 164 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:53,276 INFO L93 Difference]: Finished difference Result 351 states and 538 transitions. [2023-11-06 21:57:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:57:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2023-11-06 21:57:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:53,282 INFO L225 Difference]: With dead ends: 351 [2023-11-06 21:57:53,282 INFO L226 Difference]: Without dead ends: 248 [2023-11-06 21:57:53,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:57:53,291 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 449 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:53,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 868 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:57:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-06 21:57:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 110. [2023-11-06 21:57:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 81 states have internal predecessors, (117), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-06 21:57:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 171 transitions. [2023-11-06 21:57:53,314 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 171 transitions. Word has length 173 [2023-11-06 21:57:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:53,315 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 171 transitions. [2023-11-06 21:57:53,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 171 transitions. [2023-11-06 21:57:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 21:57:53,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:53,319 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:53,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:53,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:53,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:53,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1215823798, now seen corresponding path program 1 times [2023-11-06 21:57:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066823142] [2023-11-06 21:57:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:53,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:53,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305909670] [2023-11-06 21:57:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:53,590 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:53,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:57:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:53,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:57:53,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:57:54,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066823142] [2023-11-06 21:57:54,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305909670] [2023-11-06 21:57:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305909670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:54,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:54,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:57:54,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434471975] [2023-11-06 21:57:54,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:57:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:57:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:54,367 INFO L87 Difference]: Start difference. First operand 110 states and 171 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:54,829 INFO L93 Difference]: Finished difference Result 323 states and 500 transitions. [2023-11-06 21:57:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:57:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2023-11-06 21:57:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:54,833 INFO L225 Difference]: With dead ends: 323 [2023-11-06 21:57:54,833 INFO L226 Difference]: Without dead ends: 216 [2023-11-06 21:57:54,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:57:54,835 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 334 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:54,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 531 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-06 21:57:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 132. [2023-11-06 21:57:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.4563106796116505) internal successors, (150), 103 states have internal predecessors, (150), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-06 21:57:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 204 transitions. [2023-11-06 21:57:54,859 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 204 transitions. Word has length 173 [2023-11-06 21:57:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:54,860 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 204 transitions. [2023-11-06 21:57:54,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 204 transitions. [2023-11-06 21:57:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:57:54,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:54,863 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:54,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:55,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:55,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1982404637, now seen corresponding path program 1 times [2023-11-06 21:57:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350251726] [2023-11-06 21:57:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:55,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:55,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995834060] [2023-11-06 21:57:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:55,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:55,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:57:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:55,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:57:55,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:57:55,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:55,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:55,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350251726] [2023-11-06 21:57:55,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:55,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995834060] [2023-11-06 21:57:55,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995834060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:55,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:55,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612156367] [2023-11-06 21:57:55,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:57:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:57:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:55,523 INFO L87 Difference]: Start difference. First operand 132 states and 204 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:55,732 INFO L93 Difference]: Finished difference Result 389 states and 604 transitions. [2023-11-06 21:57:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:57:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:57:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:55,743 INFO L225 Difference]: With dead ends: 389 [2023-11-06 21:57:55,743 INFO L226 Difference]: Without dead ends: 260 [2023-11-06 21:57:55,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:57:55,744 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 54 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:55,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 442 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-06 21:57:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2023-11-06 21:57:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 197 states have (on average 1.4467005076142132) internal successors, (285), 197 states have internal predecessors, (285), 54 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-06 21:57:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 393 transitions. [2023-11-06 21:57:55,774 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 393 transitions. Word has length 174 [2023-11-06 21:57:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:55,774 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 393 transitions. [2023-11-06 21:57:55,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:57:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 393 transitions. [2023-11-06 21:57:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:57:55,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:55,778 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:55,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:57:55,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:55,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 903213217, now seen corresponding path program 1 times [2023-11-06 21:57:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:55,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203265638] [2023-11-06 21:57:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:56,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:56,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897490613] [2023-11-06 21:57:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:56,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:56,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:57:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:57:56,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 726 proven. 36 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2023-11-06 21:57:56,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-11-06 21:57:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203265638] [2023-11-06 21:57:56,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897490613] [2023-11-06 21:57:56,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897490613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:56,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:56,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-06 21:57:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929596968] [2023-11-06 21:57:56,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:57:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:57:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:57:56,614 INFO L87 Difference]: Start difference. First operand 254 states and 393 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2023-11-06 21:57:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:57,413 INFO L93 Difference]: Finished difference Result 600 states and 917 transitions. [2023-11-06 21:57:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:57:57,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 174 [2023-11-06 21:57:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:57,418 INFO L225 Difference]: With dead ends: 600 [2023-11-06 21:57:57,418 INFO L226 Difference]: Without dead ends: 349 [2023-11-06 21:57:57,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:57:57,420 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 252 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:57,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 460 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:57:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-06 21:57:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 277. [2023-11-06 21:57:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 215 states have (on average 1.3674418604651162) internal successors, (294), 216 states have internal predecessors, (294), 56 states have call successors, (56), 5 states have call predecessors, (56), 5 states have return successors, (56), 55 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 21:57:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 406 transitions. [2023-11-06 21:57:57,451 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 406 transitions. Word has length 174 [2023-11-06 21:57:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:57,452 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 406 transitions. [2023-11-06 21:57:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2023-11-06 21:57:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 406 transitions. [2023-11-06 21:57:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:57:57,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:57,455 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:57,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:57,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:57:57,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:57,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:57,662 INFO L85 PathProgramCache]: Analyzing trace with hash -117855137, now seen corresponding path program 1 times [2023-11-06 21:57:57,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:57,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136993029] [2023-11-06 21:57:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:57,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:57,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:57,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875292018] [2023-11-06 21:57:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:57,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:57,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:57,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:57,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:57:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:57:58,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:57:59,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:59,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136993029] [2023-11-06 21:57:59,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875292018] [2023-11-06 21:57:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875292018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:59,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:59,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 21:57:59,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842755137] [2023-11-06 21:57:59,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:59,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:57:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:57:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:57:59,367 INFO L87 Difference]: Start difference. First operand 277 states and 406 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:01,017 INFO L93 Difference]: Finished difference Result 633 states and 913 transitions. [2023-11-06 21:58:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:58:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:58:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:01,024 INFO L225 Difference]: With dead ends: 633 [2023-11-06 21:58:01,024 INFO L226 Difference]: Without dead ends: 472 [2023-11-06 21:58:01,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:58:01,026 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 251 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:01,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 895 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:58:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-11-06 21:58:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 293. [2023-11-06 21:58:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 231 states have (on average 1.3766233766233766) internal successors, (318), 232 states have internal predecessors, (318), 56 states have call successors, (56), 5 states have call predecessors, (56), 5 states have return successors, (56), 55 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-06 21:58:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 430 transitions. [2023-11-06 21:58:01,059 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 430 transitions. Word has length 174 [2023-11-06 21:58:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 430 transitions. [2023-11-06 21:58:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 430 transitions. [2023-11-06 21:58:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:58:01,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:01,063 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:01,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:01,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:01,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1090931489, now seen corresponding path program 1 times [2023-11-06 21:58:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:01,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510037872] [2023-11-06 21:58:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:01,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:01,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:01,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039845205] [2023-11-06 21:58:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:01,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:01,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:58:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:58:01,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 870 proven. 51 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2023-11-06 21:58:02,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:58:02,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510037872] [2023-11-06 21:58:02,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039845205] [2023-11-06 21:58:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039845205] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:02,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-06 21:58:02,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829056811] [2023-11-06 21:58:02,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:02,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:58:02,414 INFO L87 Difference]: Start difference. First operand 293 states and 430 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:03,100 INFO L93 Difference]: Finished difference Result 752 states and 1106 transitions. [2023-11-06 21:58:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:58:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:58:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:03,107 INFO L225 Difference]: With dead ends: 752 [2023-11-06 21:58:03,107 INFO L226 Difference]: Without dead ends: 575 [2023-11-06 21:58:03,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:58:03,109 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 90 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:03,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 491 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:58:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-06 21:58:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 445. [2023-11-06 21:58:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 370 states have (on average 1.4108108108108108) internal successors, (522), 374 states have internal predecessors, (522), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 21:58:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 654 transitions. [2023-11-06 21:58:03,159 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 654 transitions. Word has length 174 [2023-11-06 21:58:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:03,160 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 654 transitions. [2023-11-06 21:58:03,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 654 transitions. [2023-11-06 21:58:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:58:03,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:03,163 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:03,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:03,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:03,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:03,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1791996067, now seen corresponding path program 1 times [2023-11-06 21:58:03,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:03,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287543490] [2023-11-06 21:58:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:03,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:03,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:03,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447512874] [2023-11-06 21:58:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:03,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:03,404 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:03,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:58:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:58:03,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 726 proven. 36 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2023-11-06 21:58:03,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:58:03,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287543490] [2023-11-06 21:58:03,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447512874] [2023-11-06 21:58:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447512874] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:03,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:03,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-06 21:58:03,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386907309] [2023-11-06 21:58:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:03,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:58:03,986 INFO L87 Difference]: Start difference. First operand 445 states and 654 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:04,232 INFO L93 Difference]: Finished difference Result 737 states and 1076 transitions. [2023-11-06 21:58:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:58:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:04,237 INFO L225 Difference]: With dead ends: 737 [2023-11-06 21:58:04,237 INFO L226 Difference]: Without dead ends: 459 [2023-11-06 21:58:04,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:58:04,240 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 59 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:04,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 358 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-06 21:58:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 443. [2023-11-06 21:58:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 368 states have (on average 1.4103260869565217) internal successors, (519), 372 states have internal predecessors, (519), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 21:58:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 651 transitions. [2023-11-06 21:58:04,282 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 651 transitions. Word has length 174 [2023-11-06 21:58:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:04,283 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 651 transitions. [2023-11-06 21:58:04,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 651 transitions. [2023-11-06 21:58:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:58:04,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:04,286 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:04,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:04,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:04,493 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:04,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 84444564, now seen corresponding path program 1 times [2023-11-06 21:58:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:04,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268763854] [2023-11-06 21:58:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:04,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:04,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741652349] [2023-11-06 21:58:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:04,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:04,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:04,521 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:04,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:58:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:04,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 21:58:04,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 873 proven. 90 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-06 21:58:07,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:58:11,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268763854] [2023-11-06 21:58:11,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741652349] [2023-11-06 21:58:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741652349] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:11,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:11,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [23] total 32 [2023-11-06 21:58:11,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046389172] [2023-11-06 21:58:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:58:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:58:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:58:11,700 INFO L87 Difference]: Start difference. First operand 443 states and 651 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:24,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:25,460 INFO L93 Difference]: Finished difference Result 1562 states and 2280 transitions. [2023-11-06 21:58:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:58:25,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:58:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:25,471 INFO L225 Difference]: With dead ends: 1562 [2023-11-06 21:58:25,471 INFO L226 Difference]: Without dead ends: 1122 [2023-11-06 21:58:25,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=382, Invalid=1598, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 21:58:25,475 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 421 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:25,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 753 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 761 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2023-11-06 21:58:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2023-11-06 21:58:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 469. [2023-11-06 21:58:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 394 states have (on average 1.4238578680203047) internal successors, (561), 398 states have internal predecessors, (561), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 21:58:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 693 transitions. [2023-11-06 21:58:25,578 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 693 transitions. Word has length 174 [2023-11-06 21:58:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:25,580 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 693 transitions. [2023-11-06 21:58:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 693 transitions. [2023-11-06 21:58:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:58:25,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:25,583 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:25,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:25,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:25,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:25,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -616620014, now seen corresponding path program 1 times [2023-11-06 21:58:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:25,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030769856] [2023-11-06 21:58:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:25,827 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:25,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608471699] [2023-11-06 21:58:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:25,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:25,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:25,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:58:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:58:26,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 744 proven. 51 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-11-06 21:58:27,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:58:29,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:29,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030769856] [2023-11-06 21:58:29,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:29,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608471699] [2023-11-06 21:58:29,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608471699] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:29,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:29,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2023-11-06 21:58:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748287296] [2023-11-06 21:58:29,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:58:29,028 INFO L87 Difference]: Start difference. First operand 469 states and 693 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:31,675 INFO L93 Difference]: Finished difference Result 1599 states and 2347 transitions. [2023-11-06 21:58:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:58:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:58:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:31,688 INFO L225 Difference]: With dead ends: 1599 [2023-11-06 21:58:31,689 INFO L226 Difference]: Without dead ends: 1133 [2023-11-06 21:58:31,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:58:31,691 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 333 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:31,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 788 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:58:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2023-11-06 21:58:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 461. [2023-11-06 21:58:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 386 states have (on average 1.422279792746114) internal successors, (549), 390 states have internal predecessors, (549), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 21:58:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 681 transitions. [2023-11-06 21:58:31,756 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 681 transitions. Word has length 174 [2023-11-06 21:58:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:31,756 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 681 transitions. [2023-11-06 21:58:31,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 681 transitions. [2023-11-06 21:58:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:58:31,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:31,759 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:31,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:31,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:31,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:31,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:31,966 INFO L85 PathProgramCache]: Analyzing trace with hash -936623790, now seen corresponding path program 1 times [2023-11-06 21:58:31,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:31,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560298912] [2023-11-06 21:58:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:31,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:31,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141609934] [2023-11-06 21:58:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:31,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:31,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:31,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:32,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:58:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:58:32,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:58:32,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560298912] [2023-11-06 21:58:32,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141609934] [2023-11-06 21:58:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141609934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:32,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:32,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:58:32,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229942406] [2023-11-06 21:58:32,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:32,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:58:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:58:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:32,651 INFO L87 Difference]: Start difference. First operand 461 states and 681 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:33,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:33,519 INFO L93 Difference]: Finished difference Result 1364 states and 1996 transitions. [2023-11-06 21:58:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:58:33,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 21:58:33,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:33,526 INFO L225 Difference]: With dead ends: 1364 [2023-11-06 21:58:33,526 INFO L226 Difference]: Without dead ends: 906 [2023-11-06 21:58:33,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:33,528 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 196 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:33,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 663 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-06 21:58:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 472. [2023-11-06 21:58:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 397 states have (on average 1.4030226700251889) internal successors, (557), 401 states have internal predecessors, (557), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 21:58:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 689 transitions. [2023-11-06 21:58:33,592 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 689 transitions. Word has length 174 [2023-11-06 21:58:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:33,593 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 689 transitions. [2023-11-06 21:58:33,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 21:58:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 689 transitions. [2023-11-06 21:58:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 21:58:33,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:33,595 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:33,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:33,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:58:33,805 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:33,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash 902093014, now seen corresponding path program 1 times [2023-11-06 21:58:33,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:33,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331529235] [2023-11-06 21:58:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:33,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:33,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:33,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566079140] [2023-11-06 21:58:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:33,858 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:33,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:58:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:34,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 21:58:34,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 831 proven. 81 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2023-11-06 21:58:37,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 21:58:53,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:53,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331529235] [2023-11-06 21:58:53,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:53,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566079140] [2023-11-06 21:58:53,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566079140] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:53,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:53,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [24] total 37 [2023-11-06 21:58:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893809925] [2023-11-06 21:58:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:53,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:58:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:58:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 21:58:53,185 INFO L87 Difference]: Start difference. First operand 472 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:29,169 INFO L93 Difference]: Finished difference Result 2256 states and 3215 transitions. [2023-11-06 22:00:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 22:00:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 22:00:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:29,185 INFO L225 Difference]: With dead ends: 2256 [2023-11-06 22:00:29,186 INFO L226 Difference]: Without dead ends: 1787 [2023-11-06 22:00:29,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=1268, Invalid=5872, Unknown=0, NotChecked=0, Total=7140 [2023-11-06 22:00:29,193 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 702 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:29,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 1316 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 24.1s Time] [2023-11-06 22:00:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2023-11-06 22:00:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 490. [2023-11-06 22:00:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 415 states have (on average 1.4096385542168675) internal successors, (585), 419 states have internal predecessors, (585), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:00:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2023-11-06 22:00:29,293 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 174 [2023-11-06 22:00:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:29,294 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2023-11-06 22:00:29,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2023-11-06 22:00:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 22:00:29,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:29,298 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:29,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:29,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:29,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:29,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash 201028436, now seen corresponding path program 1 times [2023-11-06 22:00:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:29,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416631327] [2023-11-06 22:00:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:29,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:29,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410784234] [2023-11-06 22:00:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:29,539 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:29,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:00:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:29,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:00:29,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:00:30,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:30,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416631327] [2023-11-06 22:00:30,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:30,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410784234] [2023-11-06 22:00:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410784234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:30,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:00:30,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620755666] [2023-11-06 22:00:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:30,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:00:30,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:30,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:00:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:00:30,763 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:32,040 INFO L93 Difference]: Finished difference Result 1475 states and 2134 transitions. [2023-11-06 22:00:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:00:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 22:00:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:32,047 INFO L225 Difference]: With dead ends: 1475 [2023-11-06 22:00:32,048 INFO L226 Difference]: Without dead ends: 988 [2023-11-06 22:00:32,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:00:32,051 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 290 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:32,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 857 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:00:32,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2023-11-06 22:00:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 472. [2023-11-06 22:00:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 397 states have (on average 1.4030226700251889) internal successors, (557), 401 states have internal predecessors, (557), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:00:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 689 transitions. [2023-11-06 22:00:32,172 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 689 transitions. Word has length 174 [2023-11-06 22:00:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 689 transitions. [2023-11-06 22:00:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 689 transitions. [2023-11-06 22:00:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 22:00:32,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:32,176 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:32,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:32,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:32,384 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:32,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash -118975340, now seen corresponding path program 1 times [2023-11-06 22:00:32,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:32,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933625726] [2023-11-06 22:00:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:32,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:32,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:32,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115301177] [2023-11-06 22:00:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:32,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:32,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:00:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:32,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:00:32,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:00:33,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:33,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:33,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933625726] [2023-11-06 22:00:33,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115301177] [2023-11-06 22:00:33,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115301177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:33,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:33,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:00:33,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210268089] [2023-11-06 22:00:33,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:33,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:00:33,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:00:33,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:00:33,719 INFO L87 Difference]: Start difference. First operand 472 states and 689 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:34,906 INFO L93 Difference]: Finished difference Result 1425 states and 2058 transitions. [2023-11-06 22:00:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:00:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-11-06 22:00:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:34,913 INFO L225 Difference]: With dead ends: 1425 [2023-11-06 22:00:34,913 INFO L226 Difference]: Without dead ends: 956 [2023-11-06 22:00:34,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:00:34,916 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 319 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:34,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 649 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:00:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-11-06 22:00:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 464. [2023-11-06 22:00:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 389 states have (on average 1.398457583547558) internal successors, (544), 393 states have internal predecessors, (544), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:00:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 676 transitions. [2023-11-06 22:00:35,041 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 676 transitions. Word has length 174 [2023-11-06 22:00:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:35,042 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 676 transitions. [2023-11-06 22:00:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 676 transitions. [2023-11-06 22:00:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:00:35,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:35,045 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:35,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:00:35,253 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:35,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1951482957, now seen corresponding path program 1 times [2023-11-06 22:00:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883260624] [2023-11-06 22:00:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:35,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:35,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745520990] [2023-11-06 22:00:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:35,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:35,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:00:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:35,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:00:35,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 873 proven. 90 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-06 22:00:38,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:00:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883260624] [2023-11-06 22:00:40,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:40,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745520990] [2023-11-06 22:00:40,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745520990] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:40,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:00:40,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [24] total 34 [2023-11-06 22:00:40,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125043544] [2023-11-06 22:00:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:40,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:00:40,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:40,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:00:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:00:40,414 INFO L87 Difference]: Start difference. First operand 464 states and 676 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:43,787 INFO L93 Difference]: Finished difference Result 1477 states and 2105 transitions. [2023-11-06 22:00:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:00:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-06 22:00:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:43,793 INFO L225 Difference]: With dead ends: 1477 [2023-11-06 22:00:43,793 INFO L226 Difference]: Without dead ends: 1016 [2023-11-06 22:00:43,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:00:43,797 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 330 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:43,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 694 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 22:00:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2023-11-06 22:00:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 440. [2023-11-06 22:00:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 365 states have (on average 1.3863013698630138) internal successors, (506), 369 states have internal predecessors, (506), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:00:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 638 transitions. [2023-11-06 22:00:43,899 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 638 transitions. Word has length 175 [2023-11-06 22:00:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:43,900 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 638 transitions. [2023-11-06 22:00:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 638 transitions. [2023-11-06 22:00:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:00:43,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:43,903 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:43,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:44,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:00:44,129 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:44,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1207759005, now seen corresponding path program 1 times [2023-11-06 22:00:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358864966] [2023-11-06 22:00:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:44,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752994734] [2023-11-06 22:00:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:44,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:44,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:00:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:44,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:00:44,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 873 proven. 90 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2023-11-06 22:00:47,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:00:50,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:50,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358864966] [2023-11-06 22:00:50,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:50,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752994734] [2023-11-06 22:00:50,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752994734] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:50,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:00:50,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [28] total 42 [2023-11-06 22:00:50,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140005161] [2023-11-06 22:00:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:50,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:00:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:00:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:00:50,306 INFO L87 Difference]: Start difference. First operand 440 states and 638 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:57,220 INFO L93 Difference]: Finished difference Result 1795 states and 2561 transitions. [2023-11-06 22:00:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 22:00:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-06 22:00:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:57,231 INFO L225 Difference]: With dead ends: 1795 [2023-11-06 22:00:57,231 INFO L226 Difference]: Without dead ends: 1358 [2023-11-06 22:00:57,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=855, Invalid=4257, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 22:00:57,236 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 501 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:57,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 947 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 22:00:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2023-11-06 22:00:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 468. [2023-11-06 22:00:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 393 states have (on average 1.3944020356234097) internal successors, (548), 397 states have internal predecessors, (548), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:00:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 680 transitions. [2023-11-06 22:00:57,345 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 680 transitions. Word has length 175 [2023-11-06 22:00:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:57,345 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 680 transitions. [2023-11-06 22:00:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:00:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 680 transitions. [2023-11-06 22:00:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:00:57,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:57,348 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:57,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:00:57,556 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:57,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1908823583, now seen corresponding path program 1 times [2023-11-06 22:00:57,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:57,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748376405] [2023-11-06 22:00:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:57,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:57,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:57,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455437666] [2023-11-06 22:00:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:57,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:57,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:57,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:00:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:57,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:00:57,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 783 proven. 63 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-11-06 22:00:59,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:01:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:00,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748376405] [2023-11-06 22:01:00,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:00,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455437666] [2023-11-06 22:01:00,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455437666] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:00,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:00,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 22 [2023-11-06 22:01:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688415642] [2023-11-06 22:01:00,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:01:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:01:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:01:00,111 INFO L87 Difference]: Start difference. First operand 468 states and 680 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:00,718 INFO L93 Difference]: Finished difference Result 1262 states and 1821 transitions. [2023-11-06 22:01:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:01:00,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-06 22:01:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:00,728 INFO L225 Difference]: With dead ends: 1262 [2023-11-06 22:01:00,728 INFO L226 Difference]: Without dead ends: 797 [2023-11-06 22:01:00,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:01:00,731 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 220 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:00,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 659 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:01:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-11-06 22:01:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 438. [2023-11-06 22:01:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 363 states have (on average 1.3884297520661157) internal successors, (504), 367 states have internal predecessors, (504), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:01:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 636 transitions. [2023-11-06 22:01:00,852 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 636 transitions. Word has length 175 [2023-11-06 22:01:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:00,853 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 636 transitions. [2023-11-06 22:01:00,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 636 transitions. [2023-11-06 22:01:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:01:00,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:00,855 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:00,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:01,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:01,062 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:01,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1156604757, now seen corresponding path program 1 times [2023-11-06 22:01:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384787113] [2023-11-06 22:01:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:01,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:01,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585096258] [2023-11-06 22:01:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:01,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:01,101 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:01,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:01:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:01,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:01:01,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 546 proven. 18 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-06 22:01:01,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:01:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384787113] [2023-11-06 22:01:02,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585096258] [2023-11-06 22:01:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585096258] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:02,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:02,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-06 22:01:02,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075885944] [2023-11-06 22:01:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:02,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:01:02,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:01:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:01:02,160 INFO L87 Difference]: Start difference. First operand 438 states and 636 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:03,272 INFO L93 Difference]: Finished difference Result 914 states and 1330 transitions. [2023-11-06 22:01:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:01:03,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-06 22:01:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:03,278 INFO L225 Difference]: With dead ends: 914 [2023-11-06 22:01:03,279 INFO L226 Difference]: Without dead ends: 635 [2023-11-06 22:01:03,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:01:03,281 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 163 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:03,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 560 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:01:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2023-11-06 22:01:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 444. [2023-11-06 22:01:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 369 states have (on average 1.3848238482384825) internal successors, (511), 373 states have internal predecessors, (511), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:01:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 643 transitions. [2023-11-06 22:01:03,391 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 643 transitions. Word has length 175 [2023-11-06 22:01:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:03,392 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 643 transitions. [2023-11-06 22:01:03,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 643 transitions. [2023-11-06 22:01:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:01:03,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:03,395 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:03,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:03,611 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:03,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash 455540179, now seen corresponding path program 1 times [2023-11-06 22:01:03,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:03,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556759483] [2023-11-06 22:01:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:03,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011372248] [2023-11-06 22:01:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:03,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:03,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:01:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:03,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:01:03,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:01:03,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:03,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556759483] [2023-11-06 22:01:03,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:03,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011372248] [2023-11-06 22:01:03,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011372248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:03,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:01:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104336427] [2023-11-06 22:01:03,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:03,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:01:03,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:03,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:01:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:03,943 INFO L87 Difference]: Start difference. First operand 444 states and 643 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:04,422 INFO L93 Difference]: Finished difference Result 841 states and 1208 transitions. [2023-11-06 22:01:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:01:04,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-06 22:01:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:04,427 INFO L225 Difference]: With dead ends: 841 [2023-11-06 22:01:04,428 INFO L226 Difference]: Without dead ends: 556 [2023-11-06 22:01:04,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:01:04,430 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 118 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 433 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:01:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-06 22:01:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 438. [2023-11-06 22:01:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 363 states have (on average 1.3856749311294765) internal successors, (503), 367 states have internal predecessors, (503), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:01:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 635 transitions. [2023-11-06 22:01:04,551 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 635 transitions. Word has length 175 [2023-11-06 22:01:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:04,552 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 635 transitions. [2023-11-06 22:01:04,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 635 transitions. [2023-11-06 22:01:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:01:04,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:04,555 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:04,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,763 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:04,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:04,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1711839869, now seen corresponding path program 1 times [2023-11-06 22:01:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:04,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784770093] [2023-11-06 22:01:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:04,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:04,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918285064] [2023-11-06 22:01:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:04,794 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:04,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:01:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:05,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:01:05,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-11-06 22:01:14,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:14,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784770093] [2023-11-06 22:01:14,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918285064] [2023-11-06 22:01:14,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918285064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:14,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:14,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-06 22:01:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056377095] [2023-11-06 22:01:14,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:01:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:01:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:01:14,082 INFO L87 Difference]: Start difference. First operand 438 states and 635 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:24,643 INFO L93 Difference]: Finished difference Result 1113 states and 1586 transitions. [2023-11-06 22:01:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:01:24,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-11-06 22:01:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:24,652 INFO L225 Difference]: With dead ends: 1113 [2023-11-06 22:01:24,653 INFO L226 Difference]: Without dead ends: 834 [2023-11-06 22:01:24,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:01:24,655 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 345 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:24,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 767 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-06 22:01:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-06 22:01:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 406. [2023-11-06 22:01:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 331 states have (on average 1.3716012084592144) internal successors, (454), 335 states have internal predecessors, (454), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-06 22:01:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 586 transitions. [2023-11-06 22:01:24,784 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 586 transitions. Word has length 175 [2023-11-06 22:01:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:24,785 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 586 transitions. [2023-11-06 22:01:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-06 22:01:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 586 transitions. [2023-11-06 22:01:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-06 22:01:24,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:24,788 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:24,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:24,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:01:24,996 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:24,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:24,996 INFO L85 PathProgramCache]: Analyzing trace with hash 520170756, now seen corresponding path program 1 times [2023-11-06 22:01:24,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:24,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965363889] [2023-11-06 22:01:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:25,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409106975] [2023-11-06 22:01:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:25,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:25,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:25,024 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:25,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4363c71f-efa5-4e9b-8252-71647859b4a0/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:01:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:25,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:01:25,243 INFO L285 TraceCheckSpWp]: Computing forward predicates...