./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 6b3d37dbb1f844bbdab9795055d991e82d88af691e0e65987480a92814525937 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:12:16,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:12:16,696 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:12:16,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:12:16,702 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:12:16,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:12:16,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:12:16,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:12:16,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:12:16,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:12:16,744 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:12:16,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:12:16,745 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:12:16,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:12:16,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:12:16,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:12:16,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:12:16,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:12:16,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:12:16,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:12:16,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:12:16,751 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:12:16,752 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:12:16,752 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:12:16,752 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:12:16,753 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:12:16,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:12:16,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:12:16,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:12:16,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:12:16,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:12:16,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:12:16,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:12:16,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:12:16,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:12:16,758 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:12:16,759 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:12:16,759 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:12:16,759 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:12:16,759 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_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b3d37dbb1f844bbdab9795055d991e82d88af691e0e65987480a92814525937 [2023-11-12 02:12:17,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:12:17,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:12:17,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:12:17,123 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:12:17,124 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:12:17,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i [2023-11-12 02:12:20,170 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:12:20,390 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:12:20,391 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i [2023-11-12 02:12:20,401 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/data/1d23573f7/af52e35012b24f01be7f041d830855b4/FLAG7ac716926 [2023-11-12 02:12:20,417 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/data/1d23573f7/af52e35012b24f01be7f041d830855b4 [2023-11-12 02:12:20,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:12:20,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:12:20,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:12:20,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:12:20,429 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:12:20,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332b4c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20, skipping insertion in model container [2023-11-12 02:12:20,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,467 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:12:20,619 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_288c2e64-43f2-48d2-a918-b3ba38bb6c36/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i[917,930] [2023-11-12 02:12:20,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:12:20,758 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:12:20,774 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_288c2e64-43f2-48d2-a918-b3ba38bb6c36/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i[917,930] [2023-11-12 02:12:20,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:12:20,862 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:12:20,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20 WrapperNode [2023-11-12 02:12:20,868 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:12:20,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:12:20,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:12:20,872 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:12:20,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,967 INFO L138 Inliner]: procedures = 26, calls = 153, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 401 [2023-11-12 02:12:20,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:12:20,968 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:12:20,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:12:20,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:12:20,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:20,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:21,013 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:21,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:21,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:21,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:21,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:12:21,047 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:12:21,047 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:12:21,047 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:12:21,048 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (1/1) ... [2023-11-12 02:12:21,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:12:21,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:21,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:12:21,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:12:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:12:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:12:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:12:21,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:12:21,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:12:21,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:12:21,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:12:21,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:12:21,296 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:12:21,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:12:21,994 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:12:22,008 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:12:22,008 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:12:22,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:22 BoogieIcfgContainer [2023-11-12 02:12:22,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:12:22,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:12:22,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:12:22,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:12:22,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:12:20" (1/3) ... [2023-11-12 02:12:22,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef0ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:12:22, skipping insertion in model container [2023-11-12 02:12:22,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:20" (2/3) ... [2023-11-12 02:12:22,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef0ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:12:22, skipping insertion in model container [2023-11-12 02:12:22,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:22" (3/3) ... [2023-11-12 02:12:22,020 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-ap_file-12.i [2023-11-12 02:12:22,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:12:22,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:12:22,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:12:22,096 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=LoopHeads, 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;@5ffa7c8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:12:22,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:12:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 80 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-12 02:12:22,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:22,119 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:22,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:22,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash -7132500, now seen corresponding path program 1 times [2023-11-12 02:12:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:22,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360217995] [2023-11-12 02:12:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:22,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:22,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360217995] [2023-11-12 02:12:22,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:12:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758962542] [2023-11-12 02:12:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:22,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:22,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:22,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:12:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:22,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:12:22,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-12 02:12:22,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:22,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758962542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:22,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:22,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:12:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876511545] [2023-11-12 02:12:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:12:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:12:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:12:22,837 INFO L87 Difference]: Start difference. First operand has 98 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 80 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 02:12:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:22,888 INFO L93 Difference]: Finished difference Result 183 states and 284 transitions. [2023-11-12 02:12:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:12:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 117 [2023-11-12 02:12:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:22,899 INFO L225 Difference]: With dead ends: 183 [2023-11-12 02:12:22,899 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:12:22,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:12:22,905 INFO L413 NwaCegarLoop]: 123 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, 123 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 [2023-11-12 02:12:22,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:12:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-12 02:12:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2023-11-12 02:12:22,955 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 117 [2023-11-12 02:12:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:22,955 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2023-11-12 02:12:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 02:12:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2023-11-12 02:12:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-12 02:12:22,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:22,960 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:22,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:23,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:12:23,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:23,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197964, now seen corresponding path program 1 times [2023-11-12 02:12:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971847724] [2023-11-12 02:12:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:23,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:23,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:23,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798617548] [2023-11-12 02:12:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:23,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:23,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:23,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:23,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:12:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:23,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:23,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:12:23,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971847724] [2023-11-12 02:12:23,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798617548] [2023-11-12 02:12:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798617548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:23,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:23,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:12:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690510234] [2023-11-12 02:12:23,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:12:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:12:23,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:12:23,546 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:23,589 INFO L93 Difference]: Finished difference Result 173 states and 243 transitions. [2023-11-12 02:12:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:12:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 117 [2023-11-12 02:12:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:23,593 INFO L225 Difference]: With dead ends: 173 [2023-11-12 02:12:23,594 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:12:23,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:12:23,601 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 45 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:23,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 309 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:12:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-12 02:12:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 70 states have internal predecessors, (90), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2023-11-12 02:12:23,631 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 117 [2023-11-12 02:12:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2023-11-12 02:12:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2023-11-12 02:12:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-12 02:12:23,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:23,640 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:23,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:23,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:23,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:23,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1498089034, now seen corresponding path program 1 times [2023-11-12 02:12:23,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:23,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940739556] [2023-11-12 02:12:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:23,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:23,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315338139] [2023-11-12 02:12:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:23,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:23,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:12:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:24,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:12:24,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:12:24,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940739556] [2023-11-12 02:12:24,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:24,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315338139] [2023-11-12 02:12:24,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315338139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:24,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:24,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:12:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124903842] [2023-11-12 02:12:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:24,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:12:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:12:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:12:24,197 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:24,255 INFO L93 Difference]: Finished difference Result 185 states and 258 transitions. [2023-11-12 02:12:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:12:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 119 [2023-11-12 02:12:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:24,259 INFO L225 Difference]: With dead ends: 185 [2023-11-12 02:12:24,259 INFO L226 Difference]: Without dead ends: 100 [2023-11-12 02:12:24,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:24,262 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 65 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:24,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 440 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-12 02:12:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2023-11-12 02:12:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2023-11-12 02:12:24,277 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 119 [2023-11-12 02:12:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:24,278 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2023-11-12 02:12:24,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2023-11-12 02:12:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-12 02:12:24,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:24,282 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:24,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:12:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:12:24,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:24,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash -183251538, now seen corresponding path program 1 times [2023-11-12 02:12:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:24,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759255837] [2023-11-12 02:12:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:24,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:24,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409174859] [2023-11-12 02:12:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:24,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:24,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:24,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:12:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:24,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:12:24,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:26,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-12 02:12:26,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2023-11-12 02:12:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:12:26,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:26,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:26,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759255837] [2023-11-12 02:12:26,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:26,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409174859] [2023-11-12 02:12:26,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409174859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:26,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:26,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:12:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243683853] [2023-11-12 02:12:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:26,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:12:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:12:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:12:26,384 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:27,359 INFO L93 Difference]: Finished difference Result 190 states and 259 transitions. [2023-11-12 02:12:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:12:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 121 [2023-11-12 02:12:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:27,369 INFO L225 Difference]: With dead ends: 190 [2023-11-12 02:12:27,369 INFO L226 Difference]: Without dead ends: 188 [2023-11-12 02:12:27,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:12:27,376 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 198 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:27,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 832 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:12:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-12 02:12:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2023-11-12 02:12:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 98 states have (on average 1.2755102040816326) internal successors, (125), 98 states have internal predecessors, (125), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2023-11-12 02:12:27,416 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 121 [2023-11-12 02:12:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:27,420 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2023-11-12 02:12:27,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2023-11-12 02:12:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 02:12:27,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:27,429 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:27,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:12:27,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:27,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:27,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1588599541, now seen corresponding path program 1 times [2023-11-12 02:12:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:27,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551110906] [2023-11-12 02:12:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:27,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152984214] [2023-11-12 02:12:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:27,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:27,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:12:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:27,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-12 02:12:27,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:28,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:12:29,020 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-12 02:12:30,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-12 02:12:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:30,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:31,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:31,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:31,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:32,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:32,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:32,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:12:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 24 proven. 368 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-12 02:12:33,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:33,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551110906] [2023-11-12 02:12:33,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152984214] [2023-11-12 02:12:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152984214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:33,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:33,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-11-12 02:12:33,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80957859] [2023-11-12 02:12:33,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:12:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:12:33,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1177, Unknown=3, NotChecked=0, Total=1332 [2023-11-12 02:12:33,977 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 29 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-12 02:12:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:39,275 INFO L93 Difference]: Finished difference Result 317 states and 414 transitions. [2023-11-12 02:12:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-12 02:12:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 122 [2023-11-12 02:12:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:39,278 INFO L225 Difference]: With dead ends: 317 [2023-11-12 02:12:39,278 INFO L226 Difference]: Without dead ends: 315 [2023-11-12 02:12:39,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=555, Invalid=3864, Unknown=3, NotChecked=0, Total=4422 [2023-11-12 02:12:39,282 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 568 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 2990 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:39,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1285 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2990 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 02:12:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-12 02:12:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 135. [2023-11-12 02:12:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 174 transitions. [2023-11-12 02:12:39,309 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 174 transitions. Word has length 122 [2023-11-12 02:12:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:39,309 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 174 transitions. [2023-11-12 02:12:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-12 02:12:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2023-11-12 02:12:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 02:12:39,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:39,312 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:39,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:39,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1589190883, now seen corresponding path program 1 times [2023-11-12 02:12:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377211752] [2023-11-12 02:12:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:39,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:39,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897806685] [2023-11-12 02:12:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:39,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:39,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:39,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:12:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:39,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-12 02:12:39,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:39,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:12:40,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-12 02:12:41,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-12 02:12:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:42,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:42,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:43,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:43,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:43,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-12 02:12:44,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:44,377 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 02:12:44,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:12:44,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:44,865 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:12:44,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2023-11-12 02:12:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 24 proven. 368 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-12 02:12:45,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377211752] [2023-11-12 02:12:45,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897806685] [2023-11-12 02:12:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897806685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:45,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-12 02:12:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284332468] [2023-11-12 02:12:45,732 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 02:12:45,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 02:12:45,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1323, Unknown=2, NotChecked=0, Total=1482 [2023-11-12 02:12:45,735 INFO L87 Difference]: Start difference. First operand 135 states and 174 transitions. Second operand has 30 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 7 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-12 02:12:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:50,844 INFO L93 Difference]: Finished difference Result 298 states and 388 transitions. [2023-11-12 02:12:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-12 02:12:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 7 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 123 [2023-11-12 02:12:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:50,847 INFO L225 Difference]: With dead ends: 298 [2023-11-12 02:12:50,847 INFO L226 Difference]: Without dead ends: 296 [2023-11-12 02:12:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=614, Invalid=4354, Unknown=2, NotChecked=0, Total=4970 [2023-11-12 02:12:50,851 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 678 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 2777 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:50,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1099 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2777 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-12 02:12:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-12 02:12:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 158. [2023-11-12 02:12:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 136 states have (on average 1.2720588235294117) internal successors, (173), 136 states have internal predecessors, (173), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 205 transitions. [2023-11-12 02:12:50,877 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 205 transitions. Word has length 123 [2023-11-12 02:12:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:50,878 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 205 transitions. [2023-11-12 02:12:50,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 7 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-12 02:12:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 205 transitions. [2023-11-12 02:12:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 02:12:50,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:50,880 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:50,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:51,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:51,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1238954064, now seen corresponding path program 1 times [2023-11-12 02:12:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335720720] [2023-11-12 02:12:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:51,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:51,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100267085] [2023-11-12 02:12:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:51,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:51,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:51,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:51,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:12:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:51,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 02:12:51,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:51,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:12:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:51,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:52,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:52,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:52,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:52,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:52,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:52,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:52,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:52,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-12 02:12:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-12 02:12:52,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:52,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:52,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335720720] [2023-11-12 02:12:52,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:52,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100267085] [2023-11-12 02:12:52,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100267085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:52,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-12 02:12:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267125732] [2023-11-12 02:12:52,695 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:12:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:12:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=113, Unknown=7, NotChecked=0, Total=156 [2023-11-12 02:12:52,697 INFO L87 Difference]: Start difference. First operand 158 states and 205 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 02:12:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:53,441 INFO L93 Difference]: Finished difference Result 351 states and 446 transitions. [2023-11-12 02:12:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:12:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 124 [2023-11-12 02:12:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:53,445 INFO L225 Difference]: With dead ends: 351 [2023-11-12 02:12:53,445 INFO L226 Difference]: Without dead ends: 196 [2023-11-12 02:12:53,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=405, Unknown=9, NotChecked=0, Total=552 [2023-11-12 02:12:53,447 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 156 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:53,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 322 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:12:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-12 02:12:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 163. [2023-11-12 02:12:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 140 states have (on average 1.2642857142857142) internal successors, (177), 140 states have internal predecessors, (177), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2023-11-12 02:12:53,471 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 124 [2023-11-12 02:12:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:53,472 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2023-11-12 02:12:53,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 02:12:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2023-11-12 02:12:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 02:12:53,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:53,474 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:53,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:53,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:53,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash -763938710, now seen corresponding path program 1 times [2023-11-12 02:12:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191392776] [2023-11-12 02:12:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:53,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:53,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666856279] [2023-11-12 02:12:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:53,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:53,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:53,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:53,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:12:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:53,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 02:12:53,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:54,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-12 02:12:54,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:54,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2023-11-12 02:12:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:12:54,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191392776] [2023-11-12 02:12:54,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666856279] [2023-11-12 02:12:54,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666856279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:54,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:54,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:12:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281328378] [2023-11-12 02:12:54,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:12:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:12:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:12:54,919 INFO L87 Difference]: Start difference. First operand 163 states and 209 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:55,761 INFO L93 Difference]: Finished difference Result 301 states and 391 transitions. [2023-11-12 02:12:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:12:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-12 02:12:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:55,764 INFO L225 Difference]: With dead ends: 301 [2023-11-12 02:12:55,764 INFO L226 Difference]: Without dead ends: 299 [2023-11-12 02:12:55,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:12:55,766 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 190 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:55,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1171 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:12:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-12 02:12:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 184. [2023-11-12 02:12:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 161 states have (on average 1.2732919254658386) internal successors, (205), 161 states have internal predecessors, (205), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 237 transitions. [2023-11-12 02:12:55,793 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 237 transitions. Word has length 124 [2023-11-12 02:12:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:55,794 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 237 transitions. [2023-11-12 02:12:55,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 237 transitions. [2023-11-12 02:12:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 02:12:55,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:55,797 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:55,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:56,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:56,003 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:56,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1094624298, now seen corresponding path program 1 times [2023-11-12 02:12:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661659118] [2023-11-12 02:12:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:56,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:56,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121959343] [2023-11-12 02:12:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:56,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:56,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:12:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:56,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:12:56,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:56,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:56,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-12 02:12:56,944 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:12:56,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-12 02:12:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:12:56,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:56,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661659118] [2023-11-12 02:12:56,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121959343] [2023-11-12 02:12:56,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121959343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:56,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:56,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:12:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765418207] [2023-11-12 02:12:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:12:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:12:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:56,958 INFO L87 Difference]: Start difference. First operand 184 states and 237 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:57,282 INFO L93 Difference]: Finished difference Result 405 states and 520 transitions. [2023-11-12 02:12:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:12:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-12 02:12:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:57,285 INFO L225 Difference]: With dead ends: 405 [2023-11-12 02:12:57,285 INFO L226 Difference]: Without dead ends: 224 [2023-11-12 02:12:57,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:12:57,286 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 176 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:57,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 271 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:12:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-12 02:12:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 184. [2023-11-12 02:12:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 161 states have internal predecessors, (200), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:12:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2023-11-12 02:12:57,305 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 124 [2023-11-12 02:12:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:57,306 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2023-11-12 02:12:57,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:12:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2023-11-12 02:12:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-12 02:12:57,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:57,308 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:57,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:57,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:57,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:57,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:57,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2058585282, now seen corresponding path program 1 times [2023-11-12 02:12:57,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:57,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358612143] [2023-11-12 02:12:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:57,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:57,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:57,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372082931] [2023-11-12 02:12:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:57,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:57,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:57,545 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:57,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:12:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:57,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:12:57,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:58,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:12:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:58,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:58,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:58,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:59,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:59,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:59,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:59,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:12:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:59,741 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-12 02:12:59,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2023-11-12 02:13:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:13:00,022 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-12 02:13:00,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 38 [2023-11-12 02:13:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-12 02:13:00,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:00,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:00,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358612143] [2023-11-12 02:13:00,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:13:00,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372082931] [2023-11-12 02:13:00,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372082931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:00,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:00,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-12 02:13:00,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482511373] [2023-11-12 02:13:00,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:13:00,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:13:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:13:00,161 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 02:13:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:01,081 INFO L93 Difference]: Finished difference Result 418 states and 519 transitions. [2023-11-12 02:13:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:13:01,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 125 [2023-11-12 02:13:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:01,089 INFO L225 Difference]: With dead ends: 418 [2023-11-12 02:13:01,089 INFO L226 Difference]: Without dead ends: 237 [2023-11-12 02:13:01,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:13:01,091 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 237 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:01,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 284 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:13:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-12 02:13:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 191. [2023-11-12 02:13:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 168 states have (on average 1.25) internal successors, (210), 168 states have internal predecessors, (210), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:13:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 242 transitions. [2023-11-12 02:13:01,115 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 242 transitions. Word has length 125 [2023-11-12 02:13:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:01,115 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 242 transitions. [2023-11-12 02:13:01,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 02:13:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 242 transitions. [2023-11-12 02:13:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-12 02:13:01,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:01,117 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:01,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:13:01,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:01,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash -859819254, now seen corresponding path program 1 times [2023-11-12 02:13:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:01,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329116163] [2023-11-12 02:13:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:01,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:13:01,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679648698] [2023-11-12 02:13:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:01,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:01,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:01,358 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:01,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:13:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:01,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:13:01,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:13:02,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-12 02:13:02,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:13:02,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2023-11-12 02:13:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:13:02,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:02,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:02,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329116163] [2023-11-12 02:13:02,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:13:02,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679648698] [2023-11-12 02:13:02,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679648698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:02,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:02,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:13:02,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909624657] [2023-11-12 02:13:02,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:02,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:13:02,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:13:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:02,936 INFO L87 Difference]: Start difference. First operand 191 states and 242 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:13:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:03,560 INFO L93 Difference]: Finished difference Result 413 states and 520 transitions. [2023-11-12 02:13:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 126 [2023-11-12 02:13:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:03,563 INFO L225 Difference]: With dead ends: 413 [2023-11-12 02:13:03,563 INFO L226 Difference]: Without dead ends: 225 [2023-11-12 02:13:03,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:03,564 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 148 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:03,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 302 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:13:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-12 02:13:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 202. [2023-11-12 02:13:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 179 states have (on average 1.217877094972067) internal successors, (218), 179 states have internal predecessors, (218), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:13:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 250 transitions. [2023-11-12 02:13:03,592 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 250 transitions. Word has length 126 [2023-11-12 02:13:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:03,593 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 250 transitions. [2023-11-12 02:13:03,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:13:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 250 transitions. [2023-11-12 02:13:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-12 02:13:03,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:03,595 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:03,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-12 02:13:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:13:03,802 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:03,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1365477640, now seen corresponding path program 1 times [2023-11-12 02:13:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:03,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378528266] [2023-11-12 02:13:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:03,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:13:03,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634458621] [2023-11-12 02:13:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:03,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:03,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:03,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:03,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:13:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:04,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:13:04,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:04,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:13:04,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-12 02:13:05,262 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:13:05,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 52 [2023-11-12 02:13:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:13:05,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:05,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:05,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378528266] [2023-11-12 02:13:05,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:13:05,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634458621] [2023-11-12 02:13:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634458621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:05,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:05,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:13:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302607826] [2023-11-12 02:13:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:05,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:13:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:13:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:13:05,397 INFO L87 Difference]: Start difference. First operand 202 states and 250 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:13:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:06,214 INFO L93 Difference]: Finished difference Result 413 states and 509 transitions. [2023-11-12 02:13:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-11-12 02:13:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:06,216 INFO L225 Difference]: With dead ends: 413 [2023-11-12 02:13:06,216 INFO L226 Difference]: Without dead ends: 214 [2023-11-12 02:13:06,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:06,218 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 119 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:06,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 250 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:13:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-12 02:13:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 198. [2023-11-12 02:13:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 175 states have (on average 1.2114285714285715) internal successors, (212), 175 states have internal predecessors, (212), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:13:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 244 transitions. [2023-11-12 02:13:06,245 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 244 transitions. Word has length 127 [2023-11-12 02:13:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:06,246 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 244 transitions. [2023-11-12 02:13:06,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 02:13:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 244 transitions. [2023-11-12 02:13:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-12 02:13:06,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:06,248 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:06,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:13:06,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:06,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash -52322497, now seen corresponding path program 1 times [2023-11-12 02:13:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534653834] [2023-11-12 02:13:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:06,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:13:06,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512023409] [2023-11-12 02:13:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:06,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:06,486 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:06,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_288c2e64-43f2-48d2-a918-b3ba38bb6c36/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:13:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:06,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:13:06,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:13:08,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-12 02:13:11,735 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:13:11,735 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2023-11-12 02:13:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-12 02:13:11,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:11,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534653834] [2023-11-12 02:13:11,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:13:11,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512023409] [2023-11-12 02:13:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512023409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:11,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:13:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098118140] [2023-11-12 02:13:11,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:11,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:13:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:13:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:11,770 INFO L87 Difference]: Start difference. First operand 198 states and 244 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16)