./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.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_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/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_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/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_0b2b4af2-2cf8-4cf5-be5a-f00764356337/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 7ce47381267ee67677a133028db906aae8ff01d6ab9cce9bbfb67fc1f629a942 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:22:54,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:22:54,706 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:22:54,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:22:54,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:22:54,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:22:54,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:22:54,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:22:54,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:22:54,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:22:54,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:22:54,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:22:54,764 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:22:54,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:22:54,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:22:54,766 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:22:54,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:22:54,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:22:54,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:22:54,768 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:22:54,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:22:54,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:22:54,770 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:22:54,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:22:54,771 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:22:54,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:22:54,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:22:54,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:22:54,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:54,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:22:54,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:22:54,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:22:54,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:22:54,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:22:54,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:22:54,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:22:54,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:22:54,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:22:54,776 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:22:54,776 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_0b2b4af2-2cf8-4cf5-be5a-f00764356337/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ce47381267ee67677a133028db906aae8ff01d6ab9cce9bbfb67fc1f629a942 [2023-11-06 22:22:55,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:22:55,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:22:55,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:22:55,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:22:55,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:22:55,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i [2023-11-06 22:22:58,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:22:58,721 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:22:58,723 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i [2023-11-06 22:22:58,744 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/data/a99a80053/715f83b58bb14a8091f0e10ffc7f9e39/FLAG3dd1e008d [2023-11-06 22:22:58,760 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/data/a99a80053/715f83b58bb14a8091f0e10ffc7f9e39 [2023-11-06 22:22:58,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:22:58,764 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:22:58,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:58,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:22:58,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:22:58,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:58" (1/1) ... [2023-11-06 22:22:58,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6e3f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:58, skipping insertion in model container [2023-11-06 22:22:58,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:58" (1/1) ... [2023-11-06 22:22:58,846 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:59,004 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_0b2b4af2-2cf8-4cf5-be5a-f00764356337/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i[916,929] [2023-11-06 22:22:59,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:59,365 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:22:59,381 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_0b2b4af2-2cf8-4cf5-be5a-f00764356337/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-70.i[916,929] [2023-11-06 22:22:59,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:59,647 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:22:59,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59 WrapperNode [2023-11-06 22:22:59,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:59,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:59,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:22:59,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:22:59,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:22:59,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:22:59,893 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 699 [2023-11-06 22:22:59,893 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:59,894 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:22:59,895 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:22:59,895 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:22:59,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:22:59,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:22:59,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:22:59,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:23:00,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:23:00,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:23:00,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:23:00,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:23:00,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:23:00,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:23:00,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:23:00,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:23:00,136 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (1/1) ... [2023-11-06 22:23:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:23:00,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:00,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:23:00,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:23:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:23:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:23:00,210 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:23:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:23:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:23:00,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:23:00,354 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:23:00,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:23:01,921 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:23:01,933 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:23:01,933 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:23:01,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:23:01 BoogieIcfgContainer [2023-11-06 22:23:01,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:23:01,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:23:01,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:23:01,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:23:01,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:22:58" (1/3) ... [2023-11-06 22:23:01,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b43c6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:23:01, skipping insertion in model container [2023-11-06 22:23:01,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:59" (2/3) ... [2023-11-06 22:23:01,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b43c6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:23:01, skipping insertion in model container [2023-11-06 22:23:01,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:23:01" (3/3) ... [2023-11-06 22:23:01,948 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-70.i [2023-11-06 22:23:01,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:23:01,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:23:02,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:23:02,061 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;@2978a3aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:23:02,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:23:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 271 states, 208 states have (on average 1.5817307692307692) internal successors, (329), 209 states have internal predecessors, (329), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:23:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-06 22:23:02,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:02,153 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:02,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:02,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash 270350749, now seen corresponding path program 1 times [2023-11-06 22:23:02,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:02,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962017246] [2023-11-06 22:23:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962017246] [2023-11-06 22:23:02,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:23:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396916547] [2023-11-06 22:23:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:02,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:02,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:02,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:02,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:23:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:03,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:23:03,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2023-11-06 22:23:03,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:03,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396916547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:23:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709744785] [2023-11-06 22:23:03,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:23:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:23:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:23:03,579 INFO L87 Difference]: Start difference. First operand has 271 states, 208 states have (on average 1.5817307692307692) internal successors, (329), 209 states have internal predecessors, (329), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) Second operand has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) [2023-11-06 22:23:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:03,707 INFO L93 Difference]: Finished difference Result 533 states and 948 transitions. [2023-11-06 22:23:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:23:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) Word has length 432 [2023-11-06 22:23:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:03,731 INFO L225 Difference]: With dead ends: 533 [2023-11-06 22:23:03,732 INFO L226 Difference]: Without dead ends: 265 [2023-11-06 22:23:03,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:23:03,750 INFO L413 NwaCegarLoop]: 437 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, 437 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:03,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:23:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-06 22:23:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-11-06 22:23:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 203 states have (on average 1.561576354679803) internal successors, (317), 203 states have internal predecessors, (317), 60 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:23:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 437 transitions. [2023-11-06 22:23:03,866 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 437 transitions. Word has length 432 [2023-11-06 22:23:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:03,867 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 437 transitions. [2023-11-06 22:23:03,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 2 states have call successors, (60) [2023-11-06 22:23:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 437 transitions. [2023-11-06 22:23:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-06 22:23:03,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:03,883 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:03,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:23:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:23:04,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:04,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1650871445, now seen corresponding path program 1 times [2023-11-06 22:23:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:04,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999236840] [2023-11-06 22:23:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:04,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:04,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404019904] [2023-11-06 22:23:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:04,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:04,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:04,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:23:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:04,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:04,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:04,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:04,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999236840] [2023-11-06 22:23:04,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404019904] [2023-11-06 22:23:04,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404019904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:04,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:04,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184188589] [2023-11-06 22:23:04,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:04,887 INFO L87 Difference]: Start difference. First operand 265 states and 437 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:05,032 INFO L93 Difference]: Finished difference Result 733 states and 1213 transitions. [2023-11-06 22:23:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-06 22:23:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:05,041 INFO L225 Difference]: With dead ends: 733 [2023-11-06 22:23:05,041 INFO L226 Difference]: Without dead ends: 471 [2023-11-06 22:23:05,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:05,044 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 335 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:05,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 847 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-06 22:23:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-11-06 22:23:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 370 states have (on average 1.5810810810810811) internal successors, (585), 371 states have internal predecessors, (585), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-06 22:23:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 775 transitions. [2023-11-06 22:23:05,125 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 775 transitions. Word has length 432 [2023-11-06 22:23:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:05,129 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 775 transitions. [2023-11-06 22:23:05,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 775 transitions. [2023-11-06 22:23:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-06 22:23:05,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:05,146 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:05,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:05,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:05,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash -260171113, now seen corresponding path program 1 times [2023-11-06 22:23:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249165901] [2023-11-06 22:23:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:05,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:05,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228956496] [2023-11-06 22:23:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:05,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:05,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:23:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:05,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:05,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:06,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:06,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249165901] [2023-11-06 22:23:06,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228956496] [2023-11-06 22:23:06,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228956496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:06,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:06,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:06,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658947567] [2023-11-06 22:23:06,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:06,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:06,081 INFO L87 Difference]: Start difference. First operand 468 states and 775 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:06,262 INFO L93 Difference]: Finished difference Result 1368 states and 2263 transitions. [2023-11-06 22:23:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-06 22:23:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:06,274 INFO L225 Difference]: With dead ends: 1368 [2023-11-06 22:23:06,274 INFO L226 Difference]: Without dead ends: 903 [2023-11-06 22:23:06,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:06,277 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 380 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:06,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 872 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-06 22:23:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 664. [2023-11-06 22:23:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 566 states have (on average 1.627208480565371) internal successors, (921), 567 states have internal predecessors, (921), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-06 22:23:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1111 transitions. [2023-11-06 22:23:06,349 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1111 transitions. Word has length 432 [2023-11-06 22:23:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:06,350 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1111 transitions. [2023-11-06 22:23:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1111 transitions. [2023-11-06 22:23:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-06 22:23:06,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:06,361 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:06,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:06,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:06,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:06,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1646956523, now seen corresponding path program 1 times [2023-11-06 22:23:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:06,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626685169] [2023-11-06 22:23:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:06,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:06,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423925151] [2023-11-06 22:23:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:06,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:06,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:06,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:23:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:07,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:07,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:07,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:07,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:07,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626685169] [2023-11-06 22:23:07,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:07,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423925151] [2023-11-06 22:23:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423925151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:07,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:07,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163902982] [2023-11-06 22:23:07,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:07,277 INFO L87 Difference]: Start difference. First operand 664 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:07,451 INFO L93 Difference]: Finished difference Result 1972 states and 3302 transitions. [2023-11-06 22:23:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-06 22:23:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:07,468 INFO L225 Difference]: With dead ends: 1972 [2023-11-06 22:23:07,469 INFO L226 Difference]: Without dead ends: 1311 [2023-11-06 22:23:07,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:07,476 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 408 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:07,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1021 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2023-11-06 22:23:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 728. [2023-11-06 22:23:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 630 states have (on average 1.6365079365079365) internal successors, (1031), 631 states have internal predecessors, (1031), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-06 22:23:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1221 transitions. [2023-11-06 22:23:07,560 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1221 transitions. Word has length 432 [2023-11-06 22:23:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:07,561 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 1221 transitions. [2023-11-06 22:23:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1221 transitions. [2023-11-06 22:23:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-06 22:23:07,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:07,574 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:07,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:07,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:07,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -588348081, now seen corresponding path program 1 times [2023-11-06 22:23:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:07,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92243124] [2023-11-06 22:23:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:07,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:07,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739014331] [2023-11-06 22:23:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:07,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:07,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:07,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:23:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:08,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:08,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:08,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92243124] [2023-11-06 22:23:08,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739014331] [2023-11-06 22:23:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739014331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:08,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:08,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648952475] [2023-11-06 22:23:08,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:08,490 INFO L87 Difference]: Start difference. First operand 728 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:08,658 INFO L93 Difference]: Finished difference Result 2166 states and 3633 transitions. [2023-11-06 22:23:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-06 22:23:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:08,671 INFO L225 Difference]: With dead ends: 2166 [2023-11-06 22:23:08,671 INFO L226 Difference]: Without dead ends: 1441 [2023-11-06 22:23:08,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:08,674 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 414 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:08,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 959 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2023-11-06 22:23:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 840. [2023-11-06 22:23:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 742 states have (on average 1.6455525606469004) internal successors, (1221), 743 states have internal predecessors, (1221), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-06 22:23:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1411 transitions. [2023-11-06 22:23:08,749 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1411 transitions. Word has length 432 [2023-11-06 22:23:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:08,750 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1411 transitions. [2023-11-06 22:23:08,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1411 transitions. [2023-11-06 22:23:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-06 22:23:08,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:08,757 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:08,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:08,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:08,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:08,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1617707379, now seen corresponding path program 1 times [2023-11-06 22:23:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:08,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131556757] [2023-11-06 22:23:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:09,073 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:09,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422836997] [2023-11-06 22:23:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:09,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:09,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:09,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:23:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:09,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:09,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:09,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131556757] [2023-11-06 22:23:09,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422836997] [2023-11-06 22:23:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422836997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720289217] [2023-11-06 22:23:09,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:09,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:09,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:09,820 INFO L87 Difference]: Start difference. First operand 840 states and 1411 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:10,032 INFO L93 Difference]: Finished difference Result 2482 states and 4163 transitions. [2023-11-06 22:23:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 432 [2023-11-06 22:23:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:10,051 INFO L225 Difference]: With dead ends: 2482 [2023-11-06 22:23:10,051 INFO L226 Difference]: Without dead ends: 1645 [2023-11-06 22:23:10,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:10,058 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 380 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:10,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 825 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2023-11-06 22:23:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1262. [2023-11-06 22:23:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1164 states have (on average 1.6348797250859106) internal successors, (1903), 1165 states have internal predecessors, (1903), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-06 22:23:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 2093 transitions. [2023-11-06 22:23:10,165 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 2093 transitions. Word has length 432 [2023-11-06 22:23:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:10,167 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 2093 transitions. [2023-11-06 22:23:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 2093 transitions. [2023-11-06 22:23:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-06 22:23:10,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:10,175 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:10,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:10,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:23:10,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:10,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2080779227, now seen corresponding path program 1 times [2023-11-06 22:23:10,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:10,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292859565] [2023-11-06 22:23:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:10,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461326694] [2023-11-06 22:23:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:10,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:10,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:10,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:23:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:11,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:23:11,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:11,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:11,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:11,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292859565] [2023-11-06 22:23:11,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:11,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461326694] [2023-11-06 22:23:11,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461326694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:11,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:11,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:23:11,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565203445] [2023-11-06 22:23:11,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:23:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:23:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:23:11,117 INFO L87 Difference]: Start difference. First operand 1262 states and 2093 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:11,545 INFO L93 Difference]: Finished difference Result 3177 states and 5265 transitions. [2023-11-06 22:23:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:23:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-06 22:23:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:11,560 INFO L225 Difference]: With dead ends: 3177 [2023-11-06 22:23:11,561 INFO L226 Difference]: Without dead ends: 1918 [2023-11-06 22:23:11,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:23:11,564 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 940 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:11,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 1565 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:23:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2023-11-06 22:23:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1262. [2023-11-06 22:23:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1164 states have (on average 1.6331615120274914) internal successors, (1901), 1165 states have internal predecessors, (1901), 95 states have call successors, (95), 2 states have call predecessors, (95), 2 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-06 22:23:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 2091 transitions. [2023-11-06 22:23:11,649 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 2091 transitions. Word has length 433 [2023-11-06 22:23:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:11,650 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 2091 transitions. [2023-11-06 22:23:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 2091 transitions. [2023-11-06 22:23:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-06 22:23:11,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:11,657 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:11,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:11,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:23:11,878 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:11,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1878955293, now seen corresponding path program 1 times [2023-11-06 22:23:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:11,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704150060] [2023-11-06 22:23:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:11,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:11,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503853036] [2023-11-06 22:23:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:11,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:11,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:11,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:23:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:12,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:12,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:12,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:12,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:12,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704150060] [2023-11-06 22:23:12,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:12,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503853036] [2023-11-06 22:23:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503853036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:12,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:12,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:23:12,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785470659] [2023-11-06 22:23:12,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:12,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:23:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:23:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:23:12,632 INFO L87 Difference]: Start difference. First operand 1262 states and 2091 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:13,757 INFO L93 Difference]: Finished difference Result 3826 states and 6308 transitions. [2023-11-06 22:23:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:23:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-06 22:23:13,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:13,776 INFO L225 Difference]: With dead ends: 3826 [2023-11-06 22:23:13,777 INFO L226 Difference]: Without dead ends: 2567 [2023-11-06 22:23:13,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:23:13,781 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 1600 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:13,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 1689 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:23:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2023-11-06 22:23:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 696. [2023-11-06 22:23:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 633 states have (on average 1.6161137440758293) internal successors, (1023), 633 states have internal predecessors, (1023), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:23:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1143 transitions. [2023-11-06 22:23:13,859 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1143 transitions. Word has length 433 [2023-11-06 22:23:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:13,860 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1143 transitions. [2023-11-06 22:23:13,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1143 transitions. [2023-11-06 22:23:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-06 22:23:13,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:13,866 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:13,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:14,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:14,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:14,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1910163995, now seen corresponding path program 1 times [2023-11-06 22:23:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:14,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636817708] [2023-11-06 22:23:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:14,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:14,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:14,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447080734] [2023-11-06 22:23:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:14,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:14,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:23:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:14,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:14,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:14,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:14,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636817708] [2023-11-06 22:23:14,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447080734] [2023-11-06 22:23:14,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447080734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:14,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:14,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:23:14,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67207551] [2023-11-06 22:23:14,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:14,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:23:14,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:23:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:23:14,714 INFO L87 Difference]: Start difference. First operand 696 states and 1143 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:15,145 INFO L93 Difference]: Finished difference Result 2256 states and 3691 transitions. [2023-11-06 22:23:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:23:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 433 [2023-11-06 22:23:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:15,163 INFO L225 Difference]: With dead ends: 2256 [2023-11-06 22:23:15,164 INFO L226 Difference]: Without dead ends: 1563 [2023-11-06 22:23:15,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:23:15,167 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 682 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:15,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1782 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:23:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2023-11-06 22:23:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 667. [2023-11-06 22:23:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 604 states have (on average 1.6043046357615893) internal successors, (969), 604 states have internal predecessors, (969), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:23:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1089 transitions. [2023-11-06 22:23:15,268 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1089 transitions. Word has length 433 [2023-11-06 22:23:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:15,269 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1089 transitions. [2023-11-06 22:23:15,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1089 transitions. [2023-11-06 22:23:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:15,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:15,275 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:15,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:15,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:15,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:15,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1341272531, now seen corresponding path program 1 times [2023-11-06 22:23:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:15,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969030022] [2023-11-06 22:23:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:15,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:15,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104720756] [2023-11-06 22:23:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:15,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:15,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:15,571 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:15,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:23:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:16,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:16,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:16,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:16,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969030022] [2023-11-06 22:23:16,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104720756] [2023-11-06 22:23:16,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104720756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:16,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:16,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:23:16,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388434367] [2023-11-06 22:23:16,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:16,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:23:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:23:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:23:16,198 INFO L87 Difference]: Start difference. First operand 667 states and 1089 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:17,379 INFO L93 Difference]: Finished difference Result 1838 states and 2977 transitions. [2023-11-06 22:23:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:23:17,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:17,391 INFO L225 Difference]: With dead ends: 1838 [2023-11-06 22:23:17,391 INFO L226 Difference]: Without dead ends: 1169 [2023-11-06 22:23:17,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:23:17,394 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 1247 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:17,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1247 Valid, 1423 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:23:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2023-11-06 22:23:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 662. [2023-11-06 22:23:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 599 states have (on average 1.6010016694490818) internal successors, (959), 599 states have internal predecessors, (959), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:23:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1079 transitions. [2023-11-06 22:23:17,517 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1079 transitions. Word has length 434 [2023-11-06 22:23:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:17,519 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1079 transitions. [2023-11-06 22:23:17,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1079 transitions. [2023-11-06 22:23:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:17,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:17,527 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:17,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:17,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:17,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2127632855, now seen corresponding path program 1 times [2023-11-06 22:23:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:17,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244950830] [2023-11-06 22:23:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:17,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252651768] [2023-11-06 22:23:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:17,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:17,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:17,892 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:17,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:23:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:18,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:18,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:18,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:18,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:18,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244950830] [2023-11-06 22:23:18,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:18,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252651768] [2023-11-06 22:23:18,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252651768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:18,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:18,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:18,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51860423] [2023-11-06 22:23:18,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:18,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:18,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:18,532 INFO L87 Difference]: Start difference. First operand 662 states and 1079 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:18,701 INFO L93 Difference]: Finished difference Result 1688 states and 2742 transitions. [2023-11-06 22:23:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:18,710 INFO L225 Difference]: With dead ends: 1688 [2023-11-06 22:23:18,711 INFO L226 Difference]: Without dead ends: 1029 [2023-11-06 22:23:18,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:18,714 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 405 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:18,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1108 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2023-11-06 22:23:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 662. [2023-11-06 22:23:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 599 states have (on average 1.5959933222036728) internal successors, (956), 599 states have internal predecessors, (956), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:23:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1076 transitions. [2023-11-06 22:23:18,771 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1076 transitions. Word has length 434 [2023-11-06 22:23:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:18,772 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1076 transitions. [2023-11-06 22:23:18,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1076 transitions. [2023-11-06 22:23:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:18,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:18,779 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:18,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:18,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:18,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:18,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1986225003, now seen corresponding path program 1 times [2023-11-06 22:23:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494942286] [2023-11-06 22:23:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:19,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:19,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499847417] [2023-11-06 22:23:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:19,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:19,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:19,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:19,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:23:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:19,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:23:19,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:20,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494942286] [2023-11-06 22:23:20,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499847417] [2023-11-06 22:23:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499847417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:20,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:20,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:23:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983163203] [2023-11-06 22:23:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:20,335 INFO L87 Difference]: Start difference. First operand 662 states and 1076 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:21,387 INFO L93 Difference]: Finished difference Result 3776 states and 6175 transitions. [2023-11-06 22:23:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:23:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:21,410 INFO L225 Difference]: With dead ends: 3776 [2023-11-06 22:23:21,410 INFO L226 Difference]: Without dead ends: 3117 [2023-11-06 22:23:21,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:23:21,414 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 2242 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:21,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2242 Valid, 3002 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:23:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2023-11-06 22:23:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 1555. [2023-11-06 22:23:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1383 states have (on average 1.5784526391901663) internal successors, (2183), 1385 states have internal predecessors, (2183), 164 states have call successors, (164), 7 states have call predecessors, (164), 7 states have return successors, (164), 162 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-06 22:23:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2511 transitions. [2023-11-06 22:23:21,642 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2511 transitions. Word has length 434 [2023-11-06 22:23:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:21,643 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2511 transitions. [2023-11-06 22:23:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2511 transitions. [2023-11-06 22:23:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:21,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:21,680 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:21,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:21,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:21,881 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:21,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash 10145379, now seen corresponding path program 1 times [2023-11-06 22:23:21,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:21,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005471787] [2023-11-06 22:23:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:21,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:21,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:21,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671010855] [2023-11-06 22:23:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:21,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:21,962 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:22,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:23:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:22,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:23:22,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:23,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005471787] [2023-11-06 22:23:23,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:23,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671010855] [2023-11-06 22:23:23,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671010855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:23,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:23,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:23:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715723777] [2023-11-06 22:23:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:23,213 INFO L87 Difference]: Start difference. First operand 1555 states and 2511 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:24,423 INFO L93 Difference]: Finished difference Result 8243 states and 13398 transitions. [2023-11-06 22:23:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:23:24,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:24,475 INFO L225 Difference]: With dead ends: 8243 [2023-11-06 22:23:24,476 INFO L226 Difference]: Without dead ends: 6810 [2023-11-06 22:23:24,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:23:24,481 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 2209 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2209 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:24,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2209 Valid, 3778 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:23:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6810 states. [2023-11-06 22:23:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6810 to 3389. [2023-11-06 22:23:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3135 states have (on average 1.5945773524720892) internal successors, (4999), 3142 states have internal predecessors, (4999), 239 states have call successors, (239), 14 states have call predecessors, (239), 14 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-06 22:23:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 5477 transitions. [2023-11-06 22:23:24,768 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 5477 transitions. Word has length 434 [2023-11-06 22:23:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:24,769 INFO L495 AbstractCegarLoop]: Abstraction has 3389 states and 5477 transitions. [2023-11-06 22:23:24,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 5477 transitions. [2023-11-06 22:23:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:24,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:24,782 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:24,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:24,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:24,992 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:24,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:24,993 INFO L85 PathProgramCache]: Analyzing trace with hash -161595957, now seen corresponding path program 1 times [2023-11-06 22:23:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:24,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124901637] [2023-11-06 22:23:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:24,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:25,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:25,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438076262] [2023-11-06 22:23:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:25,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:25,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:25,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:23:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:25,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:23:25,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:26,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124901637] [2023-11-06 22:23:26,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438076262] [2023-11-06 22:23:26,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438076262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:26,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:26,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:23:26,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540094010] [2023-11-06 22:23:26,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:26,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:26,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:26,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:26,440 INFO L87 Difference]: Start difference. First operand 3389 states and 5477 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:27,586 INFO L93 Difference]: Finished difference Result 13414 states and 21773 transitions. [2023-11-06 22:23:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:23:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:27,617 INFO L225 Difference]: With dead ends: 13414 [2023-11-06 22:23:27,617 INFO L226 Difference]: Without dead ends: 10147 [2023-11-06 22:23:27,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:23:27,627 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 1788 mSDsluCounter, 2568 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:27,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1788 Valid, 3124 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:23:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10147 states. [2023-11-06 22:23:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10147 to 3701. [2023-11-06 22:23:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3701 states, 3447 states have (on average 1.6022628372497825) internal successors, (5523), 3454 states have internal predecessors, (5523), 239 states have call successors, (239), 14 states have call predecessors, (239), 14 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-06 22:23:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3701 states to 3701 states and 6001 transitions. [2023-11-06 22:23:28,013 INFO L78 Accepts]: Start accepts. Automaton has 3701 states and 6001 transitions. Word has length 434 [2023-11-06 22:23:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:28,014 INFO L495 AbstractCegarLoop]: Abstraction has 3701 states and 6001 transitions. [2023-11-06 22:23:28,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3701 states and 6001 transitions. [2023-11-06 22:23:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:28,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:28,028 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:28,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:28,238 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:28,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1533403255, now seen corresponding path program 1 times [2023-11-06 22:23:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:28,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310719815] [2023-11-06 22:23:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:28,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024777513] [2023-11-06 22:23:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:28,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:28,315 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:28,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:23:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:28,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:23:28,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:30,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:30,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310719815] [2023-11-06 22:23:30,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024777513] [2023-11-06 22:23:30,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024777513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:30,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:30,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:23:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979989851] [2023-11-06 22:23:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:30,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:23:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:23:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:23:30,443 INFO L87 Difference]: Start difference. First operand 3701 states and 6001 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:31,069 INFO L93 Difference]: Finished difference Result 10512 states and 17106 transitions. [2023-11-06 22:23:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:23:31,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:31,091 INFO L225 Difference]: With dead ends: 10512 [2023-11-06 22:23:31,092 INFO L226 Difference]: Without dead ends: 6932 [2023-11-06 22:23:31,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:23:31,101 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 518 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:31,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1686 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:23:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2023-11-06 22:23:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 3700. [2023-11-06 22:23:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3446 states have (on average 1.6021474172954149) internal successors, (5521), 3453 states have internal predecessors, (5521), 239 states have call successors, (239), 14 states have call predecessors, (239), 14 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-06 22:23:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5999 transitions. [2023-11-06 22:23:31,431 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5999 transitions. Word has length 434 [2023-11-06 22:23:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:31,432 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5999 transitions. [2023-11-06 22:23:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5999 transitions. [2023-11-06 22:23:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:31,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:31,445 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:31,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:31,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:31,655 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:31,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 683695753, now seen corresponding path program 1 times [2023-11-06 22:23:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:31,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402347907] [2023-11-06 22:23:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:31,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:31,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022399790] [2023-11-06 22:23:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:31,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:31,737 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:31,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:23:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:32,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:23:32,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3557 proven. 78 refuted. 0 times theorem prover too weak. 3445 trivial. 0 not checked. [2023-11-06 22:23:32,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 99 proven. 78 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:23:33,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402347907] [2023-11-06 22:23:33,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:33,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022399790] [2023-11-06 22:23:33,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022399790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:33,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:33,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:23:33,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616615627] [2023-11-06 22:23:33,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:33,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:23:33,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:23:33,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:23:33,340 INFO L87 Difference]: Start difference. First operand 3700 states and 5999 transitions. Second operand has 16 states, 16 states have (on average 14.625) internal successors, (234), 16 states have internal predecessors, (234), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2023-11-06 22:23:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:36,509 INFO L93 Difference]: Finished difference Result 11459 states and 18550 transitions. [2023-11-06 22:23:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:23:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.625) internal successors, (234), 16 states have internal predecessors, (234), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) Word has length 434 [2023-11-06 22:23:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:36,531 INFO L225 Difference]: With dead ends: 11459 [2023-11-06 22:23:36,531 INFO L226 Difference]: Without dead ends: 7880 [2023-11-06 22:23:36,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:23:36,541 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 2605 mSDsluCounter, 3887 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2640 SdHoareTripleChecker+Valid, 4674 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:36,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2640 Valid, 4674 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:23:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2023-11-06 22:23:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 5093. [2023-11-06 22:23:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5093 states, 4822 states have (on average 1.6124014931563666) internal successors, (7775), 4830 states have internal predecessors, (7775), 250 states have call successors, (250), 20 states have call predecessors, (250), 20 states have return successors, (250), 242 states have call predecessors, (250), 250 states have call successors, (250) [2023-11-06 22:23:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5093 states to 5093 states and 8275 transitions. [2023-11-06 22:23:36,958 INFO L78 Accepts]: Start accepts. Automaton has 5093 states and 8275 transitions. Word has length 434 [2023-11-06 22:23:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:36,959 INFO L495 AbstractCegarLoop]: Abstraction has 5093 states and 8275 transitions. [2023-11-06 22:23:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.625) internal successors, (234), 16 states have internal predecessors, (234), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2023-11-06 22:23:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5093 states and 8275 transitions. [2023-11-06 22:23:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:36,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:36,977 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:36,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:37,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:37,188 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:37,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash 464841035, now seen corresponding path program 1 times [2023-11-06 22:23:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:37,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063532859] [2023-11-06 22:23:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:37,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:37,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735328283] [2023-11-06 22:23:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:37,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:37,266 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:37,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:23:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:37,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:23:37,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3557 proven. 78 refuted. 0 times theorem prover too weak. 3445 trivial. 0 not checked. [2023-11-06 22:23:38,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 99 proven. 78 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:23:38,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:38,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063532859] [2023-11-06 22:23:38,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:38,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735328283] [2023-11-06 22:23:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735328283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:38,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 22:23:38,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487588359] [2023-11-06 22:23:38,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:38,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:23:38,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:23:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:23:38,818 INFO L87 Difference]: Start difference. First operand 5093 states and 8275 transitions. Second operand has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2023-11-06 22:23:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:39,847 INFO L93 Difference]: Finished difference Result 8716 states and 14120 transitions. [2023-11-06 22:23:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:23:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) Word has length 434 [2023-11-06 22:23:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:39,859 INFO L225 Difference]: With dead ends: 8716 [2023-11-06 22:23:39,859 INFO L226 Difference]: Without dead ends: 3748 [2023-11-06 22:23:39,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:23:39,866 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 897 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:39,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1378 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:23:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2023-11-06 22:23:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3698. [2023-11-06 22:23:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3444 states have (on average 1.5972706155632985) internal successors, (5501), 3451 states have internal predecessors, (5501), 235 states have call successors, (235), 18 states have call predecessors, (235), 18 states have return successors, (235), 228 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-06 22:23:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5971 transitions. [2023-11-06 22:23:40,142 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5971 transitions. Word has length 434 [2023-11-06 22:23:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:40,143 INFO L495 AbstractCegarLoop]: Abstraction has 3698 states and 5971 transitions. [2023-11-06 22:23:40,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 3 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 3 states have call predecessors, (87), 3 states have call successors, (87) [2023-11-06 22:23:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5971 transitions. [2023-11-06 22:23:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-06 22:23:40,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:40,156 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:40,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:23:40,376 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:40,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash 316201829, now seen corresponding path program 1 times [2023-11-06 22:23:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654279214] [2023-11-06 22:23:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:40,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:40,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:40,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040640613] [2023-11-06 22:23:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:40,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:40,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:40,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:40,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:23:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:41,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:23:41,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:41,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:41,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:41,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654279214] [2023-11-06 22:23:41,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040640613] [2023-11-06 22:23:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040640613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:41,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:23:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590098228] [2023-11-06 22:23:41,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:41,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:41,281 INFO L87 Difference]: Start difference. First operand 3698 states and 5971 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:41,633 INFO L93 Difference]: Finished difference Result 7283 states and 11763 transitions. [2023-11-06 22:23:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 434 [2023-11-06 22:23:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:41,652 INFO L225 Difference]: With dead ends: 7283 [2023-11-06 22:23:41,653 INFO L226 Difference]: Without dead ends: 3714 [2023-11-06 22:23:41,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:23:41,658 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 201 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:41,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1061 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2023-11-06 22:23:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 2320. [2023-11-06 22:23:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2166 states have (on average 1.5914127423822715) internal successors, (3447), 2168 states have internal predecessors, (3447), 140 states have call successors, (140), 13 states have call predecessors, (140), 13 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:23:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3727 transitions. [2023-11-06 22:23:41,827 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3727 transitions. Word has length 434 [2023-11-06 22:23:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:41,828 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 3727 transitions. [2023-11-06 22:23:41,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3727 transitions. [2023-11-06 22:23:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-06 22:23:41,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:41,838 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:41,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:42,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:23:42,049 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:42,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -102770889, now seen corresponding path program 1 times [2023-11-06 22:23:42,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:42,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550108489] [2023-11-06 22:23:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:42,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:42,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:42,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549495508] [2023-11-06 22:23:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:42,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:42,137 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:42,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:23:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:42,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:23:42,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:42,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550108489] [2023-11-06 22:23:42,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549495508] [2023-11-06 22:23:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549495508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:42,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:42,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:23:42,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364901360] [2023-11-06 22:23:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:42,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:23:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:23:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:23:42,918 INFO L87 Difference]: Start difference. First operand 2320 states and 3727 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:44,081 INFO L93 Difference]: Finished difference Result 5996 states and 9610 transitions. [2023-11-06 22:23:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:23:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 435 [2023-11-06 22:23:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:44,096 INFO L225 Difference]: With dead ends: 5996 [2023-11-06 22:23:44,096 INFO L226 Difference]: Without dead ends: 3809 [2023-11-06 22:23:44,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:23:44,101 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 1706 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:44,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1706 Valid, 1934 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:23:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2023-11-06 22:23:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 2316. [2023-11-06 22:23:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2162 states have (on average 1.5906567992599445) internal successors, (3439), 2164 states have internal predecessors, (3439), 140 states have call successors, (140), 13 states have call predecessors, (140), 13 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:23:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3719 transitions. [2023-11-06 22:23:44,288 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3719 transitions. Word has length 435 [2023-11-06 22:23:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:44,289 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3719 transitions. [2023-11-06 22:23:44,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3719 transitions. [2023-11-06 22:23:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-06 22:23:44,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:44,299 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:44,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:44,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:44,510 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:44,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1119050544, now seen corresponding path program 1 times [2023-11-06 22:23:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005465720] [2023-11-06 22:23:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:44,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:44,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353330479] [2023-11-06 22:23:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:44,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:44,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:44,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:23:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:45,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:45,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:23:45,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:45,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:45,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005465720] [2023-11-06 22:23:45,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353330479] [2023-11-06 22:23:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353330479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:45,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:23:45,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:23:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634592939] [2023-11-06 22:23:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:45,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:23:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:23:45,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:23:45,448 INFO L87 Difference]: Start difference. First operand 2316 states and 3719 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:47,113 INFO L93 Difference]: Finished difference Result 7926 states and 12614 transitions. [2023-11-06 22:23:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:23:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 435 [2023-11-06 22:23:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:47,128 INFO L225 Difference]: With dead ends: 7926 [2023-11-06 22:23:47,128 INFO L226 Difference]: Without dead ends: 5679 [2023-11-06 22:23:47,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:23:47,132 INFO L413 NwaCegarLoop]: 1276 mSDtfsCounter, 1178 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:47,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 2931 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:23:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2023-11-06 22:23:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 3914. [2023-11-06 22:23:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3675 states have (on average 1.588843537414966) internal successors, (5839), 3682 states have internal predecessors, (5839), 215 states have call successors, (215), 23 states have call predecessors, (215), 23 states have return successors, (215), 208 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-06 22:23:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 6269 transitions. [2023-11-06 22:23:47,425 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 6269 transitions. Word has length 435 [2023-11-06 22:23:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:47,426 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 6269 transitions. [2023-11-06 22:23:47,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:23:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 6269 transitions. [2023-11-06 22:23:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-06 22:23:47,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:47,438 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:47,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:47,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:47,654 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:47,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2012536882, now seen corresponding path program 1 times [2023-11-06 22:23:47,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:47,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949391778] [2023-11-06 22:23:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:47,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:47,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709117025] [2023-11-06 22:23:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:47,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:47,724 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:47,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:23:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:48,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:23:48,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 293 proven. 174 refuted. 0 times theorem prover too weak. 6613 trivial. 0 not checked. [2023-11-06 22:23:49,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3 proven. 174 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:23:49,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:49,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949391778] [2023-11-06 22:23:49,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:49,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709117025] [2023-11-06 22:23:49,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709117025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:49,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:49,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:23:49,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788073429] [2023-11-06 22:23:49,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:49,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:23:49,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:23:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:23:49,663 INFO L87 Difference]: Start difference. First operand 3914 states and 6269 transitions. Second operand has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-06 22:23:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:50,817 INFO L93 Difference]: Finished difference Result 7769 states and 12412 transitions. [2023-11-06 22:23:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:23:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) Word has length 435 [2023-11-06 22:23:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:50,830 INFO L225 Difference]: With dead ends: 7769 [2023-11-06 22:23:50,831 INFO L226 Difference]: Without dead ends: 3990 [2023-11-06 22:23:50,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:23:50,838 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 807 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:50,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1460 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:23:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2023-11-06 22:23:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3950. [2023-11-06 22:23:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3702 states have (on average 1.584008643976229) internal successors, (5864), 3709 states have internal predecessors, (5864), 215 states have call successors, (215), 32 states have call predecessors, (215), 32 states have return successors, (215), 208 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-06 22:23:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 6294 transitions. [2023-11-06 22:23:51,181 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 6294 transitions. Word has length 435 [2023-11-06 22:23:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:51,182 INFO L495 AbstractCegarLoop]: Abstraction has 3950 states and 6294 transitions. [2023-11-06 22:23:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-06 22:23:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 6294 transitions. [2023-11-06 22:23:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-06 22:23:51,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:51,196 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:51,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:51,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:23:51,407 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:51,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1426260660, now seen corresponding path program 1 times [2023-11-06 22:23:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:51,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781868621] [2023-11-06 22:23:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:51,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:51,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:51,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675220872] [2023-11-06 22:23:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:51,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:51,489 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:51,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:23:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:52,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:52,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3293 proven. 114 refuted. 0 times theorem prover too weak. 3673 trivial. 0 not checked. [2023-11-06 22:23:52,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:23:53,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:53,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781868621] [2023-11-06 22:23:53,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:53,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675220872] [2023-11-06 22:23:53,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675220872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:53,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:53,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:23:53,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379460783] [2023-11-06 22:23:53,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:53,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:23:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:23:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:23:53,234 INFO L87 Difference]: Start difference. First operand 3950 states and 6294 transitions. Second operand has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 3 states have call predecessors, (99), 3 states have call successors, (99) [2023-11-06 22:23:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:53,998 INFO L93 Difference]: Finished difference Result 7809 states and 12436 transitions. [2023-11-06 22:23:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:23:53,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 3 states have call predecessors, (99), 3 states have call successors, (99) Word has length 435 [2023-11-06 22:23:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:54,009 INFO L225 Difference]: With dead ends: 7809 [2023-11-06 22:23:54,009 INFO L226 Difference]: Without dead ends: 4000 [2023-11-06 22:23:54,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:23:54,017 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 722 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:54,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 957 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:23:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2023-11-06 22:23:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 3962. [2023-11-06 22:23:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3962 states, 3711 states have (on average 1.5669630827270278) internal successors, (5815), 3718 states have internal predecessors, (5815), 215 states have call successors, (215), 35 states have call predecessors, (215), 35 states have return successors, (215), 208 states have call predecessors, (215), 215 states have call successors, (215) [2023-11-06 22:23:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 6245 transitions. [2023-11-06 22:23:54,403 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 6245 transitions. Word has length 435 [2023-11-06 22:23:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:54,404 INFO L495 AbstractCegarLoop]: Abstraction has 3962 states and 6245 transitions. [2023-11-06 22:23:54,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 3 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 3 states have call predecessors, (99), 3 states have call successors, (99) [2023-11-06 22:23:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 6245 transitions. [2023-11-06 22:23:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:23:54,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:54,416 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:54,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:23:54,626 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:54,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1827234222, now seen corresponding path program 1 times [2023-11-06 22:23:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:54,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726485721] [2023-11-06 22:23:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:54,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:54,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170754450] [2023-11-06 22:23:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:54,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:54,703 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:54,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:23:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:55,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:55,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3443 proven. 69 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2023-11-06 22:23:55,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:23:55,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:55,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726485721] [2023-11-06 22:23:55,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:55,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170754450] [2023-11-06 22:23:55,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170754450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:55,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:55,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:23:55,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944139459] [2023-11-06 22:23:55,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:55,995 INFO L87 Difference]: Start difference. First operand 3962 states and 6245 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-06 22:23:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:56,510 INFO L93 Difference]: Finished difference Result 4923 states and 7718 transitions. [2023-11-06 22:23:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:23:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 436 [2023-11-06 22:23:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:56,513 INFO L225 Difference]: With dead ends: 4923 [2023-11-06 22:23:56,513 INFO L226 Difference]: Without dead ends: 1106 [2023-11-06 22:23:56,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 864 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:23:56,519 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 301 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:56,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 894 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:23:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2023-11-06 22:23:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1082. [2023-11-06 22:23:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 919 states have (on average 1.4907508161044614) internal successors, (1370), 921 states have internal predecessors, (1370), 140 states have call successors, (140), 22 states have call predecessors, (140), 22 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:23:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1650 transitions. [2023-11-06 22:23:56,675 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1650 transitions. Word has length 436 [2023-11-06 22:23:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:56,676 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 1650 transitions. [2023-11-06 22:23:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-06 22:23:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1650 transitions. [2023-11-06 22:23:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:23:56,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:56,682 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:56,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:56,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:23:56,892 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:56,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1049038138, now seen corresponding path program 1 times [2023-11-06 22:23:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:56,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529272181] [2023-11-06 22:23:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:56,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:56,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595900571] [2023-11-06 22:23:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:56,967 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:56,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:23:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:57,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:23:57,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 2477 proven. 138 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-11-06 22:23:58,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:23:58,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:58,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529272181] [2023-11-06 22:23:58,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595900571] [2023-11-06 22:23:58,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595900571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:58,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:58,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:23:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238697659] [2023-11-06 22:23:58,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:58,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:23:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:23:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:23:58,709 INFO L87 Difference]: Start difference. First operand 1082 states and 1650 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2023-11-06 22:23:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:59,314 INFO L93 Difference]: Finished difference Result 2047 states and 3125 transitions. [2023-11-06 22:23:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:23:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 437 [2023-11-06 22:23:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:59,318 INFO L225 Difference]: With dead ends: 2047 [2023-11-06 22:23:59,318 INFO L226 Difference]: Without dead ends: 1114 [2023-11-06 22:23:59,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 866 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:23:59,321 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 450 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:59,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 931 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:23:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-11-06 22:23:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1090. [2023-11-06 22:23:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 925 states have (on average 1.4854054054054053) internal successors, (1374), 927 states have internal predecessors, (1374), 140 states have call successors, (140), 24 states have call predecessors, (140), 24 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:23:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1654 transitions. [2023-11-06 22:23:59,492 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1654 transitions. Word has length 437 [2023-11-06 22:23:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:59,495 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1654 transitions. [2023-11-06 22:23:59,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2023-11-06 22:23:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1654 transitions. [2023-11-06 22:23:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:23:59,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:59,502 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:23:59,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:59,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:23:59,718 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:59,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1250862072, now seen corresponding path program 1 times [2023-11-06 22:23:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277546547] [2023-11-06 22:23:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:59,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:59,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967039798] [2023-11-06 22:23:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:59,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:59,793 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:59,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:24:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:00,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:24:00,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:00,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277546547] [2023-11-06 22:24:00,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967039798] [2023-11-06 22:24:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967039798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:00,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:24:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718469915] [2023-11-06 22:24:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:24:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:24:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:24:00,917 INFO L87 Difference]: Start difference. First operand 1090 states and 1654 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:01,454 INFO L93 Difference]: Finished difference Result 3138 states and 4840 transitions. [2023-11-06 22:24:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:24:01,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 437 [2023-11-06 22:24:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:01,460 INFO L225 Difference]: With dead ends: 3138 [2023-11-06 22:24:01,460 INFO L226 Difference]: Without dead ends: 2013 [2023-11-06 22:24:01,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:24:01,463 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 471 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:01,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1914 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:24:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2023-11-06 22:24:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1154. [2023-11-06 22:24:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 989 states have (on average 1.499494438827098) internal successors, (1483), 991 states have internal predecessors, (1483), 140 states have call successors, (140), 24 states have call predecessors, (140), 24 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:24:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1763 transitions. [2023-11-06 22:24:01,648 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1763 transitions. Word has length 437 [2023-11-06 22:24:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:01,649 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1763 transitions. [2023-11-06 22:24:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1763 transitions. [2023-11-06 22:24:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:24:01,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:01,661 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:01,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:01,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:24:01,872 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:01,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:01,873 INFO L85 PathProgramCache]: Analyzing trace with hash 688299974, now seen corresponding path program 1 times [2023-11-06 22:24:01,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:01,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88891620] [2023-11-06 22:24:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:01,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:01,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426602784] [2023-11-06 22:24:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:01,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:01,949 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:01,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:24:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:02,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:24:02,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 2339 proven. 141 refuted. 0 times theorem prover too weak. 4600 trivial. 0 not checked. [2023-11-06 22:24:03,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 36 proven. 141 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:24:03,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:03,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88891620] [2023-11-06 22:24:03,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:03,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426602784] [2023-11-06 22:24:03,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426602784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:03,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:03,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:24:03,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842037530] [2023-11-06 22:24:03,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:03,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:24:03,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:24:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:24:03,742 INFO L87 Difference]: Start difference. First operand 1154 states and 1763 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-06 22:24:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:04,363 INFO L93 Difference]: Finished difference Result 2093 states and 3201 transitions. [2023-11-06 22:24:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:24:04,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) Word has length 437 [2023-11-06 22:24:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:04,367 INFO L225 Difference]: With dead ends: 2093 [2023-11-06 22:24:04,367 INFO L226 Difference]: Without dead ends: 1092 [2023-11-06 22:24:04,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 866 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:24:04,370 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 482 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:04,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 892 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:24:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2023-11-06 22:24:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1066. [2023-11-06 22:24:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 900 states have (on average 1.4877777777777779) internal successors, (1339), 902 states have internal predecessors, (1339), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:24:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1619 transitions. [2023-11-06 22:24:04,601 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1619 transitions. Word has length 437 [2023-11-06 22:24:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:04,602 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1619 transitions. [2023-11-06 22:24:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-06 22:24:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1619 transitions. [2023-11-06 22:24:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:24:04,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:04,608 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:04,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:24:04,819 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:04,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash 966768326, now seen corresponding path program 1 times [2023-11-06 22:24:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:04,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174393691] [2023-11-06 22:24:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:04,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581004300] [2023-11-06 22:24:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:04,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:04,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:04,920 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:04,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:24:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:05,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:24:05,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:05,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:05,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174393691] [2023-11-06 22:24:05,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581004300] [2023-11-06 22:24:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581004300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:05,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:05,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:24:05,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142663285] [2023-11-06 22:24:05,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:05,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:24:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:24:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:24:05,796 INFO L87 Difference]: Start difference. First operand 1066 states and 1619 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:06,749 INFO L93 Difference]: Finished difference Result 2365 states and 3594 transitions. [2023-11-06 22:24:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:24:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 437 [2023-11-06 22:24:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:06,752 INFO L225 Difference]: With dead ends: 2365 [2023-11-06 22:24:06,752 INFO L226 Difference]: Without dead ends: 1452 [2023-11-06 22:24:06,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:24:06,755 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 1785 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1785 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:06,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1785 Valid, 1309 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:24:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2023-11-06 22:24:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1000. [2023-11-06 22:24:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 834 states have (on average 1.4724220623501199) internal successors, (1228), 836 states have internal predecessors, (1228), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-06 22:24:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1508 transitions. [2023-11-06 22:24:06,892 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1508 transitions. Word has length 437 [2023-11-06 22:24:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:06,893 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1508 transitions. [2023-11-06 22:24:06,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1508 transitions. [2023-11-06 22:24:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:24:06,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:06,898 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:06,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:07,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:24:07,108 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:07,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1389036924, now seen corresponding path program 1 times [2023-11-06 22:24:07,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:07,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019115918] [2023-11-06 22:24:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:07,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:07,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023272416] [2023-11-06 22:24:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:07,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:07,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:07,190 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:07,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:24:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:07,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:24:08,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 2039 proven. 147 refuted. 0 times theorem prover too weak. 4894 trivial. 0 not checked. [2023-11-06 22:24:08,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 30 proven. 147 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:24:08,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:08,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019115918] [2023-11-06 22:24:08,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023272416] [2023-11-06 22:24:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023272416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:08,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:24:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738126080] [2023-11-06 22:24:08,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:24:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:24:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:24:08,955 INFO L87 Difference]: Start difference. First operand 1000 states and 1508 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2023-11-06 22:24:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:09,516 INFO L93 Difference]: Finished difference Result 1452 states and 2172 transitions. [2023-11-06 22:24:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:24:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) Word has length 437 [2023-11-06 22:24:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:09,519 INFO L225 Difference]: With dead ends: 1452 [2023-11-06 22:24:09,519 INFO L226 Difference]: Without dead ends: 605 [2023-11-06 22:24:09,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 866 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:24:09,525 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 220 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:09,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 856 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:24:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-11-06 22:24:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 581. [2023-11-06 22:24:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 438 states have (on average 1.360730593607306) internal successors, (596), 438 states have internal predecessors, (596), 120 states have call successors, (120), 22 states have call predecessors, (120), 22 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 836 transitions. [2023-11-06 22:24:09,641 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 836 transitions. Word has length 437 [2023-11-06 22:24:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:09,642 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 836 transitions. [2023-11-06 22:24:09,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2023-11-06 22:24:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 836 transitions. [2023-11-06 22:24:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:24:09,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:09,645 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:09,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:09,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:24:09,846 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:09,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:09,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1939900783, now seen corresponding path program 1 times [2023-11-06 22:24:09,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:09,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719955313] [2023-11-06 22:24:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:09,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:09,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024952212] [2023-11-06 22:24:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:09,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:09,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:09,947 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:09,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:24:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:10,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:24:10,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:10,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719955313] [2023-11-06 22:24:10,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:10,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024952212] [2023-11-06 22:24:10,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024952212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:10,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:10,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:24:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060501052] [2023-11-06 22:24:10,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:10,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:24:10,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:10,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:24:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:24:10,952 INFO L87 Difference]: Start difference. First operand 581 states and 836 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:11,619 INFO L93 Difference]: Finished difference Result 1057 states and 1534 transitions. [2023-11-06 22:24:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:24:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 438 [2023-11-06 22:24:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:11,622 INFO L225 Difference]: With dead ends: 1057 [2023-11-06 22:24:11,622 INFO L226 Difference]: Without dead ends: 609 [2023-11-06 22:24:11,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:24:11,627 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1458 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:11,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 1314 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:24:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-11-06 22:24:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 546. [2023-11-06 22:24:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 403 states have (on average 1.349875930521092) internal successors, (544), 403 states have internal predecessors, (544), 120 states have call successors, (120), 22 states have call predecessors, (120), 22 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 784 transitions. [2023-11-06 22:24:11,757 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 784 transitions. Word has length 438 [2023-11-06 22:24:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:11,758 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 784 transitions. [2023-11-06 22:24:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 784 transitions. [2023-11-06 22:24:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:24:11,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:11,763 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:11,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:11,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:24:11,973 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:11,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:11,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1177377071, now seen corresponding path program 1 times [2023-11-06 22:24:11,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:11,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79670249] [2023-11-06 22:24:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:11,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:12,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227857232] [2023-11-06 22:24:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:12,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:12,043 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:12,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:24:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:12,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:24:12,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:12,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:12,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79670249] [2023-11-06 22:24:12,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:12,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227857232] [2023-11-06 22:24:12,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227857232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:12,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:12,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056200818] [2023-11-06 22:24:12,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:12,892 INFO L87 Difference]: Start difference. First operand 546 states and 784 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:13,068 INFO L93 Difference]: Finished difference Result 898 states and 1290 transitions. [2023-11-06 22:24:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 438 [2023-11-06 22:24:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:13,071 INFO L225 Difference]: With dead ends: 898 [2023-11-06 22:24:13,071 INFO L226 Difference]: Without dead ends: 509 [2023-11-06 22:24:13,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:13,073 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 364 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:13,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 808 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:24:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-06 22:24:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 481. [2023-11-06 22:24:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 338 states have (on average 1.2810650887573964) internal successors, (433), 338 states have internal predecessors, (433), 120 states have call successors, (120), 22 states have call predecessors, (120), 22 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 673 transitions. [2023-11-06 22:24:13,170 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 673 transitions. Word has length 438 [2023-11-06 22:24:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:13,170 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 673 transitions. [2023-11-06 22:24:13,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 673 transitions. [2023-11-06 22:24:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:24:13,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:13,174 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:13,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:13,374 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:13,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:13,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1236131180, now seen corresponding path program 1 times [2023-11-06 22:24:13,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:13,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371104049] [2023-11-06 22:24:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:13,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:13,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187940363] [2023-11-06 22:24:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:13,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:13,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:13,441 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:13,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:24:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:14,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:24:14,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:14,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:14,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:14,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371104049] [2023-11-06 22:24:14,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187940363] [2023-11-06 22:24:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187940363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:14,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:24:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217001903] [2023-11-06 22:24:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:24:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:24:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:24:14,352 INFO L87 Difference]: Start difference. First operand 481 states and 673 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:14,859 INFO L93 Difference]: Finished difference Result 833 states and 1172 transitions. [2023-11-06 22:24:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:24:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 438 [2023-11-06 22:24:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:14,861 INFO L225 Difference]: With dead ends: 833 [2023-11-06 22:24:14,862 INFO L226 Difference]: Without dead ends: 509 [2023-11-06 22:24:14,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:24:14,863 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 452 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:14,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1275 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:24:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-06 22:24:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 481. [2023-11-06 22:24:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 338 states have (on average 1.2751479289940828) internal successors, (431), 338 states have internal predecessors, (431), 120 states have call successors, (120), 22 states have call predecessors, (120), 22 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 671 transitions. [2023-11-06 22:24:15,010 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 671 transitions. Word has length 438 [2023-11-06 22:24:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:15,010 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 671 transitions. [2023-11-06 22:24:15,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 671 transitions. [2023-11-06 22:24:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:24:15,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:15,015 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:15,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:15,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:15,218 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:15,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -813256662, now seen corresponding path program 1 times [2023-11-06 22:24:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827501975] [2023-11-06 22:24:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:15,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:15,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933775009] [2023-11-06 22:24:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:15,286 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:15,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:24:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:16,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:24:16,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 293 proven. 174 refuted. 0 times theorem prover too weak. 6613 trivial. 0 not checked. [2023-11-06 22:24:19,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:20,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:20,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827501975] [2023-11-06 22:24:20,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:20,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933775009] [2023-11-06 22:24:20,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933775009] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:24:20,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:24:20,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2023-11-06 22:24:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811009638] [2023-11-06 22:24:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:24:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:24:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:24:20,086 INFO L87 Difference]: Start difference. First operand 481 states and 671 transitions. Second operand has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:21,642 INFO L93 Difference]: Finished difference Result 1451 states and 2062 transitions. [2023-11-06 22:24:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:24:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 438 [2023-11-06 22:24:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:21,646 INFO L225 Difference]: With dead ends: 1451 [2023-11-06 22:24:21,646 INFO L226 Difference]: Without dead ends: 1127 [2023-11-06 22:24:21,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:24:21,648 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1633 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:21,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1633 Valid, 2193 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:24:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-11-06 22:24:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 566. [2023-11-06 22:24:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 421 states have (on average 1.2969121140142519) internal successors, (546), 421 states have internal predecessors, (546), 120 states have call successors, (120), 24 states have call predecessors, (120), 24 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 786 transitions. [2023-11-06 22:24:21,793 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 786 transitions. Word has length 438 [2023-11-06 22:24:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 786 transitions. [2023-11-06 22:24:21,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 786 transitions. [2023-11-06 22:24:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:24:21,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:21,798 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:21,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:21,999 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:21,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1097785896, now seen corresponding path program 1 times [2023-11-06 22:24:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:22,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098721594] [2023-11-06 22:24:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:22,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:22,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54760346] [2023-11-06 22:24:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:22,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:22,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:22,067 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:22,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:24:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:22,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:24:22,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:23,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098721594] [2023-11-06 22:24:23,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:23,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54760346] [2023-11-06 22:24:23,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54760346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:23,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:23,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483603930] [2023-11-06 22:24:23,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:23,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:23,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:23,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:23,457 INFO L87 Difference]: Start difference. First operand 566 states and 786 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:23,902 INFO L93 Difference]: Finished difference Result 1220 states and 1718 transitions. [2023-11-06 22:24:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:24:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 438 [2023-11-06 22:24:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:23,906 INFO L225 Difference]: With dead ends: 1220 [2023-11-06 22:24:23,906 INFO L226 Difference]: Without dead ends: 812 [2023-11-06 22:24:23,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:24:23,908 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 263 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:23,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1118 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:24:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-11-06 22:24:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 776. [2023-11-06 22:24:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 631 states have (on average 1.3438985736925515) internal successors, (848), 631 states have internal predecessors, (848), 120 states have call successors, (120), 24 states have call predecessors, (120), 24 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1088 transitions. [2023-11-06 22:24:24,041 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1088 transitions. Word has length 438 [2023-11-06 22:24:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:24,041 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1088 transitions. [2023-11-06 22:24:24,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1088 transitions. [2023-11-06 22:24:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:24:24,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:24,046 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:24,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:24,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:24,247 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:24,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:24,247 INFO L85 PathProgramCache]: Analyzing trace with hash 405620822, now seen corresponding path program 1 times [2023-11-06 22:24:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:24,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588626697] [2023-11-06 22:24:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:24,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:24,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676345449] [2023-11-06 22:24:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:24,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:24,316 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:24,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:24:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:25,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:24:25,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 293 proven. 174 refuted. 0 times theorem prover too weak. 6613 trivial. 0 not checked. [2023-11-06 22:24:26,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3 proven. 174 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:24:27,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:27,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588626697] [2023-11-06 22:24:27,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:27,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676345449] [2023-11-06 22:24:27,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676345449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:27,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:27,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:24:27,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100749370] [2023-11-06 22:24:27,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:27,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:24:27,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:27,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:24:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:24:27,758 INFO L87 Difference]: Start difference. First operand 776 states and 1088 transitions. Second operand has 18 states, 18 states have (on average 14.555555555555555) internal successors, (262), 18 states have internal predecessors, (262), 4 states have call successors, (120), 3 states have call predecessors, (120), 5 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) [2023-11-06 22:24:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:30,031 INFO L93 Difference]: Finished difference Result 1692 states and 2389 transitions. [2023-11-06 22:24:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:24:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.555555555555555) internal successors, (262), 18 states have internal predecessors, (262), 4 states have call successors, (120), 3 states have call predecessors, (120), 5 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) Word has length 439 [2023-11-06 22:24:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:30,040 INFO L225 Difference]: With dead ends: 1692 [2023-11-06 22:24:30,040 INFO L226 Difference]: Without dead ends: 1249 [2023-11-06 22:24:30,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:24:30,043 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1240 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:30,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 1841 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 22:24:30,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-06 22:24:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 808. [2023-11-06 22:24:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 663 states have (on average 1.3740573152337858) internal successors, (911), 663 states have internal predecessors, (911), 120 states have call successors, (120), 24 states have call predecessors, (120), 24 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1151 transitions. [2023-11-06 22:24:30,150 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1151 transitions. Word has length 439 [2023-11-06 22:24:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:30,151 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1151 transitions. [2023-11-06 22:24:30,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.555555555555555) internal successors, (262), 18 states have internal predecessors, (262), 4 states have call successors, (120), 3 states have call predecessors, (120), 5 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) [2023-11-06 22:24:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1151 transitions. [2023-11-06 22:24:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-06 22:24:30,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:30,155 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:30,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-06 22:24:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:30,366 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:30,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1034423809, now seen corresponding path program 1 times [2023-11-06 22:24:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:30,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154914571] [2023-11-06 22:24:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:30,432 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:30,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672939408] [2023-11-06 22:24:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:30,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:30,434 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:30,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:24:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:31,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:24:31,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-06 22:24:31,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:24:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154914571] [2023-11-06 22:24:31,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672939408] [2023-11-06 22:24:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672939408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:31,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:24:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849480307] [2023-11-06 22:24:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:24:31,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:24:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:24:31,612 INFO L87 Difference]: Start difference. First operand 808 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:32,099 INFO L93 Difference]: Finished difference Result 1733 states and 2495 transitions. [2023-11-06 22:24:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:24:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 440 [2023-11-06 22:24:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:32,102 INFO L225 Difference]: With dead ends: 1733 [2023-11-06 22:24:32,102 INFO L226 Difference]: Without dead ends: 1079 [2023-11-06 22:24:32,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:24:32,103 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 547 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:32,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1552 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:24:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2023-11-06 22:24:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 956. [2023-11-06 22:24:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 811 states have (on average 1.3921085080147966) internal successors, (1129), 811 states have internal predecessors, (1129), 120 states have call successors, (120), 24 states have call predecessors, (120), 24 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1369 transitions. [2023-11-06 22:24:32,209 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1369 transitions. Word has length 440 [2023-11-06 22:24:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:32,210 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1369 transitions. [2023-11-06 22:24:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 1 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2023-11-06 22:24:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1369 transitions. [2023-11-06 22:24:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-06 22:24:32,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:32,215 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:32,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:32,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:32,425 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:32,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash 147200963, now seen corresponding path program 1 times [2023-11-06 22:24:32,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:32,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541007705] [2023-11-06 22:24:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:32,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:32,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912807056] [2023-11-06 22:24:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:32,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:32,497 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:32,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:24:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:33,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:24:33,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 1055 proven. 18 refuted. 0 times theorem prover too weak. 6007 trivial. 0 not checked. [2023-11-06 22:24:34,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 330 proven. 21 refuted. 0 times theorem prover too weak. 6729 trivial. 0 not checked. [2023-11-06 22:24:36,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:36,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541007705] [2023-11-06 22:24:36,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:36,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912807056] [2023-11-06 22:24:36,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912807056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:36,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:36,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2023-11-06 22:24:36,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373558223] [2023-11-06 22:24:36,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:36,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:24:36,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:24:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:24:36,433 INFO L87 Difference]: Start difference. First operand 956 states and 1369 transitions. Second operand has 21 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 7 states have call successors, (120), 4 states have call predecessors, (120), 7 states have return successors, (120), 6 states have call predecessors, (120), 7 states have call successors, (120) [2023-11-06 22:24:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:40,344 INFO L93 Difference]: Finished difference Result 1519 states and 2156 transitions. [2023-11-06 22:24:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:24:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 7 states have call successors, (120), 4 states have call predecessors, (120), 7 states have return successors, (120), 6 states have call predecessors, (120), 7 states have call successors, (120) Word has length 440 [2023-11-06 22:24:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:40,347 INFO L225 Difference]: With dead ends: 1519 [2023-11-06 22:24:40,348 INFO L226 Difference]: Without dead ends: 1000 [2023-11-06 22:24:40,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=1363, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:24:40,350 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 1674 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:40,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 1474 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 22:24:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-11-06 22:24:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 976. [2023-11-06 22:24:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 826 states have (on average 1.360774818401937) internal successors, (1124), 826 states have internal predecessors, (1124), 120 states have call successors, (120), 29 states have call predecessors, (120), 29 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1364 transitions. [2023-11-06 22:24:40,482 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1364 transitions. Word has length 440 [2023-11-06 22:24:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:40,483 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1364 transitions. [2023-11-06 22:24:40,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 15.0) internal successors, (285), 19 states have internal predecessors, (285), 7 states have call successors, (120), 4 states have call predecessors, (120), 7 states have return successors, (120), 6 states have call predecessors, (120), 7 states have call successors, (120) [2023-11-06 22:24:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1364 transitions. [2023-11-06 22:24:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:24:40,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:40,489 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:40,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:40,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:40,701 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:40,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1451219969, now seen corresponding path program 1 times [2023-11-06 22:24:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405624765] [2023-11-06 22:24:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:40,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:40,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015521977] [2023-11-06 22:24:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:40,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:40,771 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:40,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:24:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:41,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:24:41,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:24:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3585 proven. 150 refuted. 0 times theorem prover too weak. 3345 trivial. 0 not checked. [2023-11-06 22:24:42,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:24:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 99 proven. 78 refuted. 0 times theorem prover too weak. 6903 trivial. 0 not checked. [2023-11-06 22:24:44,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:44,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405624765] [2023-11-06 22:24:44,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:24:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015521977] [2023-11-06 22:24:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015521977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:44,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:24:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-11-06 22:24:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122687120] [2023-11-06 22:24:44,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:44,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:24:44,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:44,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:24:44,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:24:44,248 INFO L87 Difference]: Start difference. First operand 976 states and 1364 transitions. Second operand has 16 states, 16 states have (on average 15.6875) internal successors, (251), 15 states have internal predecessors, (251), 4 states have call successors, (86), 3 states have call predecessors, (86), 5 states have return successors, (87), 4 states have call predecessors, (87), 4 states have call successors, (87) [2023-11-06 22:24:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:24:46,300 INFO L93 Difference]: Finished difference Result 2199 states and 3026 transitions. [2023-11-06 22:24:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:24:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.6875) internal successors, (251), 15 states have internal predecessors, (251), 4 states have call successors, (86), 3 states have call predecessors, (86), 5 states have return successors, (87), 4 states have call predecessors, (87), 4 states have call successors, (87) Word has length 441 [2023-11-06 22:24:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:24:46,304 INFO L225 Difference]: With dead ends: 2199 [2023-11-06 22:24:46,304 INFO L226 Difference]: Without dead ends: 1636 [2023-11-06 22:24:46,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 866 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:24:46,306 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1093 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:24:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 2015 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:24:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2023-11-06 22:24:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1072. [2023-11-06 22:24:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 922 states have (on average 1.3579175704989155) internal successors, (1252), 922 states have internal predecessors, (1252), 120 states have call successors, (120), 29 states have call predecessors, (120), 29 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-06 22:24:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1492 transitions. [2023-11-06 22:24:46,482 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1492 transitions. Word has length 441 [2023-11-06 22:24:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:24:46,482 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1492 transitions. [2023-11-06 22:24:46,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.6875) internal successors, (251), 15 states have internal predecessors, (251), 4 states have call successors, (86), 3 states have call predecessors, (86), 5 states have return successors, (87), 4 states have call predecessors, (87), 4 states have call successors, (87) [2023-11-06 22:24:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1492 transitions. [2023-11-06 22:24:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 22:24:46,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:24:46,487 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:46,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:24:46,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:46,699 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:24:46,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1670074687, now seen corresponding path program 1 times [2023-11-06 22:24:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122153420] [2023-11-06 22:24:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:46,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:24:46,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916369154] [2023-11-06 22:24:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:46,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:24:46,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:24:46,788 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:24:46,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b2b4af2-2cf8-4cf5-be5a-f00764356337/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:24:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:47,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:24:48,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 4949 proven. 684 refuted. 0 times theorem prover too weak. 1447 trivial. 0 not checked. [2023-11-06 22:25:10,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:33,880 WARN L293 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 58 DAG size of output: 36 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-06 22:25:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122153420] [2023-11-06 22:25:48,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916369154] [2023-11-06 22:25:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916369154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:48,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:25:48,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-06 22:25:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920514551] [2023-11-06 22:25:48,766 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:25:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:48,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:25:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=2013, Unknown=3, NotChecked=0, Total=2352 [2023-11-06 22:25:48,770 INFO L87 Difference]: Start difference. First operand 1072 states and 1492 transitions. Second operand has 33 states, 33 states have (on average 5.363636363636363) internal successors, (177), 31 states have internal predecessors, (177), 7 states have call successors, (60), 7 states have call predecessors, (60), 12 states have return successors, (60), 7 states have call predecessors, (60), 7 states have call successors, (60) [2023-11-06 22:25:59,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:26:05,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:26:07,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:26:09,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:26:14,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:26:21,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:26:30,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:26:31,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:26:33,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]