./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/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_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/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_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/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 1759abcdcdacb11ff4424134b4ed938cccdebafbf4e21a4bd94aebb869ddee2f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:34:14,905 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:34:15,056 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:34:15,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:34:15,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:34:15,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:34:15,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:34:15,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:34:15,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:34:15,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:34:15,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:34:15,128 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:34:15,128 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:34:15,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:34:15,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:34:15,132 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:34:15,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:34:15,133 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:34:15,133 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:34:15,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:34:15,134 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:34:15,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:34:15,136 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:34:15,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:34:15,137 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:34:15,138 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:34:15,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:34:15,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:34:15,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:34:15,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:34:15,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:34:15,143 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:34:15,143 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:34:15,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:34:15,144 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:34:15,144 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:34:15,144 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:34:15,145 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:34:15,145 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:34:15,146 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_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1759abcdcdacb11ff4424134b4ed938cccdebafbf4e21a4bd94aebb869ddee2f [2023-11-12 02:34:15,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:34:15,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:34:15,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:34:15,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:34:15,553 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:34:15,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i [2023-11-12 02:34:18,581 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:34:18,948 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:34:18,953 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i [2023-11-12 02:34:18,977 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/data/6a3f47f5a/55e78b373b664c83b82b20806f0dfcac/FLAGc1723834b [2023-11-12 02:34:18,998 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/data/6a3f47f5a/55e78b373b664c83b82b20806f0dfcac [2023-11-12 02:34:19,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:34:19,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:34:19,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:34:19,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:34:19,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:34:19,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:19,018 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788c1f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19, skipping insertion in model container [2023-11-12 02:34:19,018 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:19,109 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:34:19,324 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_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i[916,929] [2023-11-12 02:34:19,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:34:19,758 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:34:19,771 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_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-28.i[916,929] [2023-11-12 02:34:19,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:34:19,979 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:34:19,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19 WrapperNode [2023-11-12 02:34:19,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:34:19,981 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:34:19,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:34:19,981 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:34:19,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,234 INFO L138 Inliner]: procedures = 26, calls = 84, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 866 [2023-11-12 02:34:20,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:34:20,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:34:20,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:34:20,236 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:34:20,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,324 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,325 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,387 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:34:20,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:34:20,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:34:20,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:34:20,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (1/1) ... [2023-11-12 02:34:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:34:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:20,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:34:20,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:34:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:34:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:34:20,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:34:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:34:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:34:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:34:20,750 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:34:20,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:34:22,557 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:34:22,576 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:34:22,577 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:34:22,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:34:22 BoogieIcfgContainer [2023-11-12 02:34:22,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:34:22,586 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:34:22,586 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:34:22,589 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:34:22,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:34:19" (1/3) ... [2023-11-12 02:34:22,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601d74a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:34:22, skipping insertion in model container [2023-11-12 02:34:22,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:34:19" (2/3) ... [2023-11-12 02:34:22,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601d74a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:34:22, skipping insertion in model container [2023-11-12 02:34:22,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:34:22" (3/3) ... [2023-11-12 02:34:22,594 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-28.i [2023-11-12 02:34:22,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:34:22,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:34:22,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:34:22,707 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;@610a43b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:34:22,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:34:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 335 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 262 states have internal predecessors, (411), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-12 02:34:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-12 02:34:22,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:22,763 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:22,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:22,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1585181985, now seen corresponding path program 1 times [2023-11-12 02:34:22,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:22,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458000486] [2023-11-12 02:34:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:22,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:23,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:23,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458000486] [2023-11-12 02:34:23,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:34:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062900950] [2023-11-12 02:34:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:23,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:23,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:23,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:23,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:34:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:23,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:34:23,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2023-11-12 02:34:23,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:23,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062900950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:23,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:23,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:34:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264180857] [2023-11-12 02:34:23,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:24,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:34:24,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:34:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:34:24,050 INFO L87 Difference]: Start difference. First operand has 335 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 262 states have internal predecessors, (411), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-12 02:34:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:24,171 INFO L93 Difference]: Finished difference Result 662 states and 1169 transitions. [2023-11-12 02:34:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:34:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) Word has length 502 [2023-11-12 02:34:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:24,187 INFO L225 Difference]: With dead ends: 662 [2023-11-12 02:34:24,187 INFO L226 Difference]: Without dead ends: 330 [2023-11-12 02:34:24,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 501 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 02:34:24,202 INFO L413 NwaCegarLoop]: 540 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, 540 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 02:34:24,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:34:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-12 02:34:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-12 02:34:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 257 states have (on average 1.54863813229572) internal successors, (398), 257 states have internal predecessors, (398), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-12 02:34:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2023-11-12 02:34:24,346 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 502 [2023-11-12 02:34:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:24,348 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2023-11-12 02:34:24,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-12 02:34:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2023-11-12 02:34:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-12 02:34:24,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:24,373 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:24,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:24,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:34:24,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:24,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1761132841, now seen corresponding path program 1 times [2023-11-12 02:34:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:24,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081285400] [2023-11-12 02:34:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:24,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:24,827 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:24,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420210290] [2023-11-12 02:34:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:24,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:24,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:24,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:24,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:34:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:25,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:34:25,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:25,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:25,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081285400] [2023-11-12 02:34:25,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:25,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420210290] [2023-11-12 02:34:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420210290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:25,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:25,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:34:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500253531] [2023-11-12 02:34:25,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:25,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:34:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:34:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:34:25,449 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:25,566 INFO L93 Difference]: Finished difference Result 657 states and 1077 transitions. [2023-11-12 02:34:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:34:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 502 [2023-11-12 02:34:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:25,575 INFO L225 Difference]: With dead ends: 657 [2023-11-12 02:34:25,575 INFO L226 Difference]: Without dead ends: 330 [2023-11-12 02:34:25,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:34:25,578 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 645 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:25,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1060 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:34:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-12 02:34:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-12 02:34:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 257 states have internal predecessors, (397), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-12 02:34:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 539 transitions. [2023-11-12 02:34:25,617 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 539 transitions. Word has length 502 [2023-11-12 02:34:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:25,621 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 539 transitions. [2023-11-12 02:34:25,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 539 transitions. [2023-11-12 02:34:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-12 02:34:25,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:25,648 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:25,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:25,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:34:25,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:25,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1854562201, now seen corresponding path program 1 times [2023-11-12 02:34:25,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587214478] [2023-11-12 02:34:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:25,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:25,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689738550] [2023-11-12 02:34:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:25,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:25,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:34:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:26,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:34:26,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:26,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587214478] [2023-11-12 02:34:26,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689738550] [2023-11-12 02:34:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689738550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:26,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:26,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:26,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892461971] [2023-11-12 02:34:26,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:26,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:26,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:26,487 INFO L87 Difference]: Start difference. First operand 330 states and 539 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:26,532 INFO L93 Difference]: Finished difference Result 657 states and 1075 transitions. [2023-11-12 02:34:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:34:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 502 [2023-11-12 02:34:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:26,538 INFO L225 Difference]: With dead ends: 657 [2023-11-12 02:34:26,538 INFO L226 Difference]: Without dead ends: 330 [2023-11-12 02:34:26,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:26,541 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 89 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:26,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 983 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:34:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-12 02:34:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-11-12 02:34:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 257 states have (on average 1.5408560311284047) internal successors, (396), 257 states have internal predecessors, (396), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-12 02:34:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 538 transitions. [2023-11-12 02:34:26,572 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 538 transitions. Word has length 502 [2023-11-12 02:34:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:26,574 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 538 transitions. [2023-11-12 02:34:26,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 538 transitions. [2023-11-12 02:34:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-12 02:34:26,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:26,581 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:26,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:34:26,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:26,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:26,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1593217665, now seen corresponding path program 1 times [2023-11-12 02:34:26,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:26,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914355803] [2023-11-12 02:34:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:26,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:26,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734271801] [2023-11-12 02:34:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:26,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:26,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:26,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:34:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:27,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:34:27,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:27,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914355803] [2023-11-12 02:34:27,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734271801] [2023-11-12 02:34:27,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734271801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:27,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:27,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:27,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825234227] [2023-11-12 02:34:27,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:27,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:27,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:27,458 INFO L87 Difference]: Start difference. First operand 330 states and 538 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:27,541 INFO L93 Difference]: Finished difference Result 851 states and 1392 transitions. [2023-11-12 02:34:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:34:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 504 [2023-11-12 02:34:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:27,548 INFO L225 Difference]: With dead ends: 851 [2023-11-12 02:34:27,548 INFO L226 Difference]: Without dead ends: 524 [2023-11-12 02:34:27,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:34:27,551 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 314 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:27,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1057 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:34:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-12 02:34:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 464. [2023-11-12 02:34:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 391 states have (on average 1.5959079283887467) internal successors, (624), 391 states have internal predecessors, (624), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-12 02:34:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 766 transitions. [2023-11-12 02:34:27,587 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 766 transitions. Word has length 504 [2023-11-12 02:34:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:27,589 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 766 transitions. [2023-11-12 02:34:27,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 766 transitions. [2023-11-12 02:34:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-12 02:34:27,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:27,596 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:27,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:27,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:27,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash -28903982, now seen corresponding path program 1 times [2023-11-12 02:34:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019407639] [2023-11-12 02:34:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:27,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:27,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353573788] [2023-11-12 02:34:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:27,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:27,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:27,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:27,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:34:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:28,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:34:28,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:30,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:30,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019407639] [2023-11-12 02:34:30,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353573788] [2023-11-12 02:34:30,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353573788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:30,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:30,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:30,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308179569] [2023-11-12 02:34:30,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:30,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:34:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:34:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:34:30,201 INFO L87 Difference]: Start difference. First operand 464 states and 766 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:30,611 INFO L93 Difference]: Finished difference Result 1387 states and 2293 transitions. [2023-11-12 02:34:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:34:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 505 [2023-11-12 02:34:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:30,621 INFO L225 Difference]: With dead ends: 1387 [2023-11-12 02:34:30,622 INFO L226 Difference]: Without dead ends: 926 [2023-11-12 02:34:30,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 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 02:34:30,624 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 386 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:30,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1582 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:34:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-12 02:34:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 602. [2023-11-12 02:34:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 457 states have (on average 1.5448577680525164) internal successors, (706), 457 states have internal predecessors, (706), 142 states have call successors, (142), 2 states have call predecessors, (142), 2 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-12 02:34:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 990 transitions. [2023-11-12 02:34:30,711 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 990 transitions. Word has length 505 [2023-11-12 02:34:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:30,712 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 990 transitions. [2023-11-12 02:34:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 990 transitions. [2023-11-12 02:34:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-12 02:34:30,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:30,719 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:30,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:30,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:30,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1629975088, now seen corresponding path program 1 times [2023-11-12 02:34:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84253482] [2023-11-12 02:34:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:31,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807593858] [2023-11-12 02:34:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:31,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:31,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:31,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:34:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:31,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:31,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 2490 proven. 180 refuted. 0 times theorem prover too weak. 7270 trivial. 0 not checked. [2023-11-12 02:34:32,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-12 02:34:32,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84253482] [2023-11-12 02:34:32,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807593858] [2023-11-12 02:34:32,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807593858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:32,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:32,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:34:32,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190923523] [2023-11-12 02:34:32,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:32,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:34:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:32,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:34:32,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:34:32,954 INFO L87 Difference]: Start difference. First operand 602 states and 990 transitions. Second operand has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) [2023-11-12 02:34:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:33,591 INFO L93 Difference]: Finished difference Result 1075 states and 1763 transitions. [2023-11-12 02:34:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:34:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) Word has length 505 [2023-11-12 02:34:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:33,599 INFO L225 Difference]: With dead ends: 1075 [2023-11-12 02:34:33,599 INFO L226 Difference]: Without dead ends: 614 [2023-11-12 02:34:33,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:34:33,602 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 315 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:33,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1162 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:34:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-11-12 02:34:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 610. [2023-11-12 02:34:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 463 states have (on average 1.531317494600432) internal successors, (709), 463 states have internal predecessors, (709), 142 states have call successors, (142), 4 states have call predecessors, (142), 4 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-12 02:34:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 993 transitions. [2023-11-12 02:34:33,698 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 993 transitions. Word has length 505 [2023-11-12 02:34:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:33,699 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 993 transitions. [2023-11-12 02:34:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 3 states have call predecessors, (132), 3 states have call successors, (132) [2023-11-12 02:34:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 993 transitions. [2023-11-12 02:34:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-12 02:34:33,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:33,706 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:33,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:33,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:33,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:33,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash -219351200, now seen corresponding path program 1 times [2023-11-12 02:34:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:33,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880988674] [2023-11-12 02:34:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:34,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890268931] [2023-11-12 02:34:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:34,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:34,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:34,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:34,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:34:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:34,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:34,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 4110 proven. 150 refuted. 0 times theorem prover too weak. 5680 trivial. 0 not checked. [2023-11-12 02:34:35,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 60 proven. 150 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-12 02:34:35,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880988674] [2023-11-12 02:34:35,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890268931] [2023-11-12 02:34:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890268931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:35,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:35,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:34:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301874880] [2023-11-12 02:34:35,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:34:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:34:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:34:35,648 INFO L87 Difference]: Start difference. First operand 610 states and 993 transitions. Second operand has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-12 02:34:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:36,394 INFO L93 Difference]: Finished difference Result 1087 states and 1766 transitions. [2023-11-12 02:34:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:34:36,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 506 [2023-11-12 02:34:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:36,402 INFO L225 Difference]: With dead ends: 1087 [2023-11-12 02:34:36,402 INFO L226 Difference]: Without dead ends: 622 [2023-11-12 02:34:36,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:34:36,405 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 599 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:36,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 1125 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:34:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-11-12 02:34:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 618. [2023-11-12 02:34:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 469 states have (on average 1.5181236673773988) internal successors, (712), 469 states have internal predecessors, (712), 142 states have call successors, (142), 6 states have call predecessors, (142), 6 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-12 02:34:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 996 transitions. [2023-11-12 02:34:36,495 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 996 transitions. Word has length 506 [2023-11-12 02:34:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:36,496 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 996 transitions. [2023-11-12 02:34:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-12 02:34:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 996 transitions. [2023-11-12 02:34:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-11-12 02:34:36,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:36,502 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:36,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:36,717 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:36,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash -765766331, now seen corresponding path program 1 times [2023-11-12 02:34:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771168111] [2023-11-12 02:34:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:36,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:36,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123199292] [2023-11-12 02:34:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:36,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:36,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:36,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:34:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:37,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:34:37,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:37,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771168111] [2023-11-12 02:34:37,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123199292] [2023-11-12 02:34:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123199292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:37,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:37,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:34:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196346774] [2023-11-12 02:34:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:37,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:34:37,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:34:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:34:37,930 INFO L87 Difference]: Start difference. First operand 618 states and 996 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:38,343 INFO L93 Difference]: Finished difference Result 1682 states and 2720 transitions. [2023-11-12 02:34:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:34:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 507 [2023-11-12 02:34:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:38,353 INFO L225 Difference]: With dead ends: 1682 [2023-11-12 02:34:38,353 INFO L226 Difference]: Without dead ends: 1213 [2023-11-12 02:34:38,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 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 02:34:38,359 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 805 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:38,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 1568 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:34:38,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-11-12 02:34:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1202. [2023-11-12 02:34:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 979 states have (on average 1.5485188968335035) internal successors, (1516), 979 states have internal predecessors, (1516), 213 states have call successors, (213), 9 states have call predecessors, (213), 9 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2023-11-12 02:34:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1942 transitions. [2023-11-12 02:34:38,516 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1942 transitions. Word has length 507 [2023-11-12 02:34:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:38,517 INFO L495 AbstractCegarLoop]: Abstraction has 1202 states and 1942 transitions. [2023-11-12 02:34:38,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1942 transitions. [2023-11-12 02:34:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-12 02:34:38,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:38,522 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:38,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:38,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:38,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1331301817, now seen corresponding path program 1 times [2023-11-12 02:34:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:38,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122340627] [2023-11-12 02:34:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:38,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:38,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516108457] [2023-11-12 02:34:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:38,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:38,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:38,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:34:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:39,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:39,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:40,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122340627] [2023-11-12 02:34:40,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516108457] [2023-11-12 02:34:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516108457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:34:40,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859721010] [2023-11-12 02:34:40,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:40,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:34:40,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:34:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:34:40,137 INFO L87 Difference]: Start difference. First operand 1202 states and 1942 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:41,052 INFO L93 Difference]: Finished difference Result 4015 states and 6481 transitions. [2023-11-12 02:34:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:34:41,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 508 [2023-11-12 02:34:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:41,072 INFO L225 Difference]: With dead ends: 4015 [2023-11-12 02:34:41,072 INFO L226 Difference]: Without dead ends: 2962 [2023-11-12 02:34:41,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:34:41,078 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 742 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:41,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 1922 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:34:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2023-11-12 02:34:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2435. [2023-11-12 02:34:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 2064 states have (on average 1.568798449612403) internal successors, (3238), 2064 states have internal predecessors, (3238), 355 states have call successors, (355), 15 states have call predecessors, (355), 15 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 3948 transitions. [2023-11-12 02:34:41,405 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 3948 transitions. Word has length 508 [2023-11-12 02:34:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:41,406 INFO L495 AbstractCegarLoop]: Abstraction has 2435 states and 3948 transitions. [2023-11-12 02:34:41,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 3948 transitions. [2023-11-12 02:34:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-12 02:34:41,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:41,417 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:41,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:41,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:41,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:41,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:41,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1678110790, now seen corresponding path program 1 times [2023-11-12 02:34:41,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:41,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41257194] [2023-11-12 02:34:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:41,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:41,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:41,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468050887] [2023-11-12 02:34:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:41,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:41,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:41,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:41,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:34:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:42,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:34:42,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:43,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:43,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41257194] [2023-11-12 02:34:43,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468050887] [2023-11-12 02:34:43,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468050887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:43,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:34:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228869128] [2023-11-12 02:34:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:34:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:34:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:34:43,338 INFO L87 Difference]: Start difference. First operand 2435 states and 3948 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:45,002 INFO L93 Difference]: Finished difference Result 7833 states and 12624 transitions. [2023-11-12 02:34:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:34:45,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 508 [2023-11-12 02:34:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:45,039 INFO L225 Difference]: With dead ends: 7833 [2023-11-12 02:34:45,039 INFO L226 Difference]: Without dead ends: 5547 [2023-11-12 02:34:45,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:34:45,047 INFO L413 NwaCegarLoop]: 1094 mSDtfsCounter, 1628 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 3993 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:45,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 3993 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:34:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2023-11-12 02:34:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 2629. [2023-11-12 02:34:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2258 states have (on average 1.578387953941541) internal successors, (3564), 2258 states have internal predecessors, (3564), 355 states have call successors, (355), 15 states have call predecessors, (355), 15 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 4274 transitions. [2023-11-12 02:34:45,456 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 4274 transitions. Word has length 508 [2023-11-12 02:34:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:45,458 INFO L495 AbstractCegarLoop]: Abstraction has 2629 states and 4274 transitions. [2023-11-12 02:34:45,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 4274 transitions. [2023-11-12 02:34:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-11-12 02:34:45,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:45,465 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:45,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:45,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:34:45,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:45,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash 261051256, now seen corresponding path program 1 times [2023-11-12 02:34:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:45,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538098102] [2023-11-12 02:34:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:45,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:45,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271263713] [2023-11-12 02:34:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:45,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:45,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:45,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:45,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:34:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:46,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:46,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5010 proven. 96 refuted. 0 times theorem prover too weak. 4834 trivial. 0 not checked. [2023-11-12 02:34:46,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 114 proven. 96 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-12 02:34:47,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:47,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538098102] [2023-11-12 02:34:47,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:47,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271263713] [2023-11-12 02:34:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271263713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:47,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:34:47,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103366294] [2023-11-12 02:34:47,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:34:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:34:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:34:47,030 INFO L87 Difference]: Start difference. First operand 2629 states and 4274 transitions. Second operand has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-12 02:34:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:47,684 INFO L93 Difference]: Finished difference Result 5109 states and 8290 transitions. [2023-11-12 02:34:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:34:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) Word has length 508 [2023-11-12 02:34:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:47,704 INFO L225 Difference]: With dead ends: 5109 [2023-11-12 02:34:47,704 INFO L226 Difference]: Without dead ends: 2659 [2023-11-12 02:34:47,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:34:47,710 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 723 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1197 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:34:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2023-11-12 02:34:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2649. [2023-11-12 02:34:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2273 states have (on average 1.5701715794104707) internal successors, (3569), 2273 states have internal predecessors, (3569), 355 states have call successors, (355), 20 states have call predecessors, (355), 20 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 4279 transitions. [2023-11-12 02:34:47,949 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 4279 transitions. Word has length 508 [2023-11-12 02:34:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:47,950 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 4279 transitions. [2023-11-12 02:34:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-12 02:34:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 4279 transitions. [2023-11-12 02:34:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-12 02:34:47,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:47,958 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:47,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-12 02:34:48,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:34:48,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:48,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1538421316, now seen corresponding path program 1 times [2023-11-12 02:34:48,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:48,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451852564] [2023-11-12 02:34:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:48,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:48,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68747547] [2023-11-12 02:34:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:48,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:48,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:34:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:48,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:34:48,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:48,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:34:48,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451852564] [2023-11-12 02:34:48,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68747547] [2023-11-12 02:34:48,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68747547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:34:48,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:34:48,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:34:48,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379048895] [2023-11-12 02:34:48,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:48,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:34:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:34:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:34:48,947 INFO L87 Difference]: Start difference. First operand 2649 states and 4279 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:49,457 INFO L93 Difference]: Finished difference Result 7403 states and 11933 transitions. [2023-11-12 02:34:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:34:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 509 [2023-11-12 02:34:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:49,491 INFO L225 Difference]: With dead ends: 7403 [2023-11-12 02:34:49,491 INFO L226 Difference]: Without dead ends: 5045 [2023-11-12 02:34:49,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 507 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 02:34:49,498 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1063 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:49,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 1183 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:34:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5045 states. [2023-11-12 02:34:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 2695. [2023-11-12 02:34:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2314 states have (on average 1.5600691443388073) internal successors, (3610), 2314 states have internal predecessors, (3610), 355 states have call successors, (355), 25 states have call predecessors, (355), 25 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 4320 transitions. [2023-11-12 02:34:49,813 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 4320 transitions. Word has length 509 [2023-11-12 02:34:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:49,814 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 4320 transitions. [2023-11-12 02:34:49,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 4320 transitions. [2023-11-12 02:34:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2023-11-12 02:34:49,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:49,822 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:49,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:50,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:50,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:50,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -644934978, now seen corresponding path program 1 times [2023-11-12 02:34:50,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:50,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773631424] [2023-11-12 02:34:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:50,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:50,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:50,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269610423] [2023-11-12 02:34:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:50,111 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:50,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:34:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:50,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:50,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 4950 proven. 90 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-12 02:34:50,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 120 proven. 90 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-12 02:34:51,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:51,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773631424] [2023-11-12 02:34:51,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:51,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269610423] [2023-11-12 02:34:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269610423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:51,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:51,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:34:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328326167] [2023-11-12 02:34:51,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:51,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:34:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:34:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:34:51,337 INFO L87 Difference]: Start difference. First operand 2695 states and 4320 transitions. Second operand has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-12 02:34:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:51,997 INFO L93 Difference]: Finished difference Result 5205 states and 8322 transitions. [2023-11-12 02:34:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:34:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 509 [2023-11-12 02:34:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:52,044 INFO L225 Difference]: With dead ends: 5205 [2023-11-12 02:34:52,044 INFO L226 Difference]: Without dead ends: 2735 [2023-11-12 02:34:52,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 1010 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:34:52,051 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 373 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:52,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1208 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:34:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2023-11-12 02:34:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2715. [2023-11-12 02:34:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2329 states have (on average 1.5521683125805066) internal successors, (3615), 2329 states have internal predecessors, (3615), 355 states have call successors, (355), 30 states have call predecessors, (355), 30 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4325 transitions. [2023-11-12 02:34:52,264 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4325 transitions. Word has length 509 [2023-11-12 02:34:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:52,265 INFO L495 AbstractCegarLoop]: Abstraction has 2715 states and 4325 transitions. [2023-11-12 02:34:52,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-12 02:34:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4325 transitions. [2023-11-12 02:34:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-11-12 02:34:52,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:52,273 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:52,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:52,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:52,482 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:52,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1939922477, now seen corresponding path program 1 times [2023-11-12 02:34:52,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:52,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687244126] [2023-11-12 02:34:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:52,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:52,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:52,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354227913] [2023-11-12 02:34:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:52,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:52,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:52,556 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:52,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:34:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:53,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:53,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 3318 proven. 42 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2023-11-12 02:34:53,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 168 proven. 42 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-12 02:34:53,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:53,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687244126] [2023-11-12 02:34:53,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:53,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354227913] [2023-11-12 02:34:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354227913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:53,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:53,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:34:53,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362610795] [2023-11-12 02:34:53,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:53,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:34:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:34:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:34:53,652 INFO L87 Difference]: Start difference. First operand 2715 states and 4325 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-12 02:34:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:54,239 INFO L93 Difference]: Finished difference Result 5310 states and 8439 transitions. [2023-11-12 02:34:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:34:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 510 [2023-11-12 02:34:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:54,255 INFO L225 Difference]: With dead ends: 5310 [2023-11-12 02:34:54,255 INFO L226 Difference]: Without dead ends: 2765 [2023-11-12 02:34:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 1012 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:34:54,265 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 421 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:54,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1197 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:34:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2023-11-12 02:34:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2735. [2023-11-12 02:34:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2344 states have (on average 1.5447952218430034) internal successors, (3621), 2344 states have internal predecessors, (3621), 355 states have call successors, (355), 35 states have call predecessors, (355), 35 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 4331 transitions. [2023-11-12 02:34:54,566 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 4331 transitions. Word has length 510 [2023-11-12 02:34:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:54,568 INFO L495 AbstractCegarLoop]: Abstraction has 2735 states and 4331 transitions. [2023-11-12 02:34:54,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-12 02:34:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 4331 transitions. [2023-11-12 02:34:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-11-12 02:34:54,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:54,578 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:54,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:34:54,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:54,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1003659601, now seen corresponding path program 1 times [2023-11-12 02:34:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:54,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852381505] [2023-11-12 02:34:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:54,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:54,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805288361] [2023-11-12 02:34:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:54,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:54,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:54,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:54,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:34:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:55,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:34:55,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 2178 proven. 24 refuted. 0 times theorem prover too weak. 7738 trivial. 0 not checked. [2023-11-12 02:34:55,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 186 proven. 24 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-12 02:34:55,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852381505] [2023-11-12 02:34:55,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805288361] [2023-11-12 02:34:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805288361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:55,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:34:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802868561] [2023-11-12 02:34:55,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:55,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:34:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:34:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:34:55,897 INFO L87 Difference]: Start difference. First operand 2735 states and 4331 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-12 02:34:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:56,558 INFO L93 Difference]: Finished difference Result 5353 states and 8454 transitions. [2023-11-12 02:34:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:34:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 510 [2023-11-12 02:34:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:56,569 INFO L225 Difference]: With dead ends: 5353 [2023-11-12 02:34:56,570 INFO L226 Difference]: Without dead ends: 2795 [2023-11-12 02:34:56,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 1012 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:34:56,578 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 427 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:56,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1205 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:34:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2023-11-12 02:34:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2755. [2023-11-12 02:34:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2359 states have (on average 1.5375158965663416) internal successors, (3627), 2359 states have internal predecessors, (3627), 355 states have call successors, (355), 40 states have call predecessors, (355), 40 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4337 transitions. [2023-11-12 02:34:56,820 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4337 transitions. Word has length 510 [2023-11-12 02:34:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:56,821 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4337 transitions. [2023-11-12 02:34:56,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-12 02:34:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4337 transitions. [2023-11-12 02:34:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-11-12 02:34:56,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:56,829 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:56,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:57,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:34:57,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:57,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1032159891, now seen corresponding path program 1 times [2023-11-12 02:34:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671411813] [2023-11-12 02:34:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:57,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:57,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:57,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761043361] [2023-11-12 02:34:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:57,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:57,113 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:57,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:34:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:34:57,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:34:57,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 2070 proven. 186 refuted. 0 times theorem prover too weak. 7684 trivial. 0 not checked. [2023-11-12 02:34:58,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:34:59,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:59,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671411813] [2023-11-12 02:34:59,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:59,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761043361] [2023-11-12 02:34:59,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761043361] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:34:59,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:34:59,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-12 02:34:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777694820] [2023-11-12 02:34:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:34:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:34:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:34:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:34:59,149 INFO L87 Difference]: Start difference. First operand 2755 states and 4337 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:34:59,361 INFO L93 Difference]: Finished difference Result 5317 states and 8386 transitions. [2023-11-12 02:34:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:34:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 510 [2023-11-12 02:34:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:34:59,369 INFO L225 Difference]: With dead ends: 5317 [2023-11-12 02:34:59,369 INFO L226 Difference]: Without dead ends: 2745 [2023-11-12 02:34:59,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:34:59,375 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 517 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:34:59,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 513 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:34:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-11-12 02:34:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2745. [2023-11-12 02:34:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2349 states have (on average 1.5125585355470412) internal successors, (3553), 2349 states have internal predecessors, (3553), 355 states have call successors, (355), 40 states have call predecessors, (355), 40 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:34:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 4263 transitions. [2023-11-12 02:34:59,634 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 4263 transitions. Word has length 510 [2023-11-12 02:34:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:34:59,635 INFO L495 AbstractCegarLoop]: Abstraction has 2745 states and 4263 transitions. [2023-11-12 02:34:59,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:34:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 4263 transitions. [2023-11-12 02:34:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-11-12 02:34:59,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:34:59,642 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:59,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:34:59,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:34:59,851 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:34:59,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:34:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1528665457, now seen corresponding path program 1 times [2023-11-12 02:34:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:34:59,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770109856] [2023-11-12 02:34:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:34:59,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:34:59,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17616858] [2023-11-12 02:34:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:34:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:34:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:34:59,924 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:34:59,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:35:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:35:00,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:35:00,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:35:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:35:01,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:35:01,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:35:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770109856] [2023-11-12 02:35:01,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:35:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17616858] [2023-11-12 02:35:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17616858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:35:01,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:35:01,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:35:01,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065657214] [2023-11-12 02:35:01,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:35:01,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:35:01,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:35:01,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:35:01,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:35:01,106 INFO L87 Difference]: Start difference. First operand 2745 states and 4263 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:35:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:35:01,618 INFO L93 Difference]: Finished difference Result 5747 states and 8929 transitions. [2023-11-12 02:35:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:35:01,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) Word has length 511 [2023-11-12 02:35:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:35:01,628 INFO L225 Difference]: With dead ends: 5747 [2023-11-12 02:35:01,628 INFO L226 Difference]: Without dead ends: 3167 [2023-11-12 02:35:01,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 508 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 02:35:01,634 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 414 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:35:01,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1527 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:35:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2023-11-12 02:35:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 2901. [2023-11-12 02:35:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2505 states have (on average 1.5197604790419161) internal successors, (3807), 2505 states have internal predecessors, (3807), 355 states have call successors, (355), 40 states have call predecessors, (355), 40 states have return successors, (355), 355 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-12 02:35:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 4517 transitions. [2023-11-12 02:35:01,988 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 4517 transitions. Word has length 511 [2023-11-12 02:35:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:35:01,989 INFO L495 AbstractCegarLoop]: Abstraction has 2901 states and 4517 transitions. [2023-11-12 02:35:01,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71) [2023-11-12 02:35:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 4517 transitions. [2023-11-12 02:35:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-11-12 02:35:01,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:35:01,997 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:02,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:35:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:35:02,207 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:35:02,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:35:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1959231237, now seen corresponding path program 1 times [2023-11-12 02:35:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:35:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709405007] [2023-11-12 02:35:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:35:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:35:02,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:35:02,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168934177] [2023-11-12 02:35:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:35:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:35:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:35:02,294 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:35:02,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a5d644-7779-4ae1-9d0b-1d8a79bf5a04/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:35:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:35:02,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:35:02,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:35:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9940 trivial. 0 not checked. [2023-11-12 02:35:03,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:35:03,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:35:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709405007] [2023-11-12 02:35:03,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:35:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168934177] [2023-11-12 02:35:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168934177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:35:03,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:35:03,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:35:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218913743] [2023-11-12 02:35:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:35:03,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:35:03,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:35:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:35:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:35:03,047 INFO L87 Difference]: Start difference. First operand 2901 states and 4517 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 1 states have call successors, (71)