./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-53.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_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/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_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-53.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/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_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/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 71c7df1fae20fc80c584d7fcd9c77a1cbb9d81b2af2b3bc6d67d6058472b2f60 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:14:14,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:14:15,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:14:15,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:14:15,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:14:15,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:14:15,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:14:15,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:14:15,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:14:15,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:14:15,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:14:15,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:14:15,095 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:14:15,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:14:15,097 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:14:15,097 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:14:15,098 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:14:15,098 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:14:15,099 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:14:15,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:14:15,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:14:15,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:14:15,102 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:14:15,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:14:15,103 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:14:15,104 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:14:15,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:14:15,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:14:15,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:15,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:14:15,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:14:15,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:14:15,107 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:14:15,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:14:15,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:14:15,110 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:14:15,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:14:15,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:14:15,111 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:14:15,133 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_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c7df1fae20fc80c584d7fcd9c77a1cbb9d81b2af2b3bc6d67d6058472b2f60 [2023-11-12 02:14:15,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:14:15,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:14:15,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:14:15,474 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:14:15,474 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:14:15,476 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-53.i [2023-11-12 02:14:18,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:14:18,842 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:14:18,842 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-53.i [2023-11-12 02:14:18,854 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/data/0e2414566/b1d4c74cdaae4de9859d794ec4cbc8ce/FLAGf0ccd2f67 [2023-11-12 02:14:18,869 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/data/0e2414566/b1d4c74cdaae4de9859d794ec4cbc8ce [2023-11-12 02:14:18,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:14:18,873 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:14:18,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:18,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:14:18,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:14:18,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:18" (1/1) ... [2023-11-12 02:14:18,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298a7218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:18, skipping insertion in model container [2023-11-12 02:14:18,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:18" (1/1) ... [2023-11-12 02:14:18,940 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:14:19,111 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_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-53.i[916,929] [2023-11-12 02:14:19,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:19,232 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:14:19,245 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_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-53.i[916,929] [2023-11-12 02:14:19,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:19,315 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:14:19,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19 WrapperNode [2023-11-12 02:14:19,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:19,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:19,318 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:14:19,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:14:19,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,344 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,446 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 226 [2023-11-12 02:14:19,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:19,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:14:19,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:14:19,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:14:19,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,513 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:14:19,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:14:19,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:14:19,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:14:19,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (1/1) ... [2023-11-12 02:14:19,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:19,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:19,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:14:19,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:14:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:14:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:14:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:14:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:14:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:14:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:14:19,787 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:14:19,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:14:20,602 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:14:20,613 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:14:20,613 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:14:20,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:20 BoogieIcfgContainer [2023-11-12 02:14:20,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:14:20,623 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:14:20,623 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:14:20,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:14:20,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:14:18" (1/3) ... [2023-11-12 02:14:20,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2009bdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:20, skipping insertion in model container [2023-11-12 02:14:20,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:19" (2/3) ... [2023-11-12 02:14:20,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2009bdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:20, skipping insertion in model container [2023-11-12 02:14:20,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:20" (3/3) ... [2023-11-12 02:14:20,631 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount100_file-53.i [2023-11-12 02:14:20,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:14:20,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:14:20,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:20,717 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;@3e98d49e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:20,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:14:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 65 states have (on average 1.476923076923077) internal successors, (96), 66 states have internal predecessors, (96), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-12 02:14:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:20,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:20,741 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:20,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:20,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2046767455, now seen corresponding path program 1 times [2023-11-12 02:14:20,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:20,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444279184] [2023-11-12 02:14:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:21,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:21,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444279184] [2023-11-12 02:14:21,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:14:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288437975] [2023-11-12 02:14:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:21,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:21,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:21,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:21,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:14:21,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2023-11-12 02:14:21,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:21,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288437975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:21,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:21,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219080014] [2023-11-12 02:14:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:21,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:14:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:21,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:14:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:14:21,502 INFO L87 Difference]: Start difference. First operand has 93 states, 65 states have (on average 1.476923076923077) internal successors, (96), 66 states have internal predecessors, (96), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-12 02:14:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:21,541 INFO L93 Difference]: Finished difference Result 179 states and 311 transitions. [2023-11-12 02:14:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:14:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 2 states have call successors, (25) Word has length 169 [2023-11-12 02:14:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:21,553 INFO L225 Difference]: With dead ends: 179 [2023-11-12 02:14:21,553 INFO L226 Difference]: Without dead ends: 89 [2023-11-12 02:14:21,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 168 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 02:14:21,563 INFO L413 NwaCegarLoop]: 139 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, 139 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 02:14:21,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-12 02:14:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-12 02:14:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 25 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-12 02:14:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 139 transitions. [2023-11-12 02:14:21,665 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 139 transitions. Word has length 169 [2023-11-12 02:14:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:21,665 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 139 transitions. [2023-11-12 02:14:21,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-12 02:14:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 139 transitions. [2023-11-12 02:14:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:21,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:21,671 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:21,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:21,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:14:21,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:21,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1587640283, now seen corresponding path program 1 times [2023-11-12 02:14:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:21,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226953794] [2023-11-12 02:14:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:21,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:21,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393819361] [2023-11-12 02:14:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:21,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:21,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:21,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:22,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:22,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:22,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226953794] [2023-11-12 02:14:22,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393819361] [2023-11-12 02:14:22,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393819361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:22,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:22,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66758737] [2023-11-12 02:14:22,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:22,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:22,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:22,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:22,291 INFO L87 Difference]: Start difference. First operand 89 states and 139 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:22,418 INFO L93 Difference]: Finished difference Result 220 states and 343 transitions. [2023-11-12 02:14:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 169 [2023-11-12 02:14:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:22,423 INFO L225 Difference]: With dead ends: 220 [2023-11-12 02:14:22,424 INFO L226 Difference]: Without dead ends: 134 [2023-11-12 02:14:22,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 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 02:14:22,427 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 63 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:22,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 392 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-12 02:14:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2023-11-12 02:14:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.4639175257731958) internal successors, (142), 98 states have internal predecessors, (142), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 02:14:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 204 transitions. [2023-11-12 02:14:22,463 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 204 transitions. Word has length 169 [2023-11-12 02:14:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:22,466 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 204 transitions. [2023-11-12 02:14:22,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 204 transitions. [2023-11-12 02:14:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:22,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:22,479 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:22,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:22,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:22,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash 187367079, now seen corresponding path program 1 times [2023-11-12 02:14:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:22,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302868539] [2023-11-12 02:14:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:22,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937164440] [2023-11-12 02:14:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:22,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:22,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:22,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:22,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:23,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:14:23,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:23,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:23,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:23,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302868539] [2023-11-12 02:14:23,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:23,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937164440] [2023-11-12 02:14:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937164440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:23,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:14:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610633202] [2023-11-12 02:14:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:23,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:23,858 INFO L87 Difference]: Start difference. First operand 131 states and 204 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:24,419 INFO L93 Difference]: Finished difference Result 389 states and 613 transitions. [2023-11-12 02:14:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:14:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 169 [2023-11-12 02:14:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:24,426 INFO L225 Difference]: With dead ends: 389 [2023-11-12 02:14:24,426 INFO L226 Difference]: Without dead ends: 261 [2023-11-12 02:14:24,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:24,429 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 148 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:24,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 471 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-12 02:14:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 178. [2023-11-12 02:14:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 144 states have (on average 1.5277777777777777) internal successors, (220), 145 states have internal predecessors, (220), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 02:14:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 282 transitions. [2023-11-12 02:14:24,456 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 282 transitions. Word has length 169 [2023-11-12 02:14:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:24,457 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 282 transitions. [2023-11-12 02:14:24,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 282 transitions. [2023-11-12 02:14:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:14:24,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:24,461 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:24,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:24,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:14:24,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:24,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1444637754, now seen corresponding path program 1 times [2023-11-12 02:14:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:24,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935311865] [2023-11-12 02:14:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:24,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:24,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650983537] [2023-11-12 02:14:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:24,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:24,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:24,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:24,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:14:24,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:26,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:26,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935311865] [2023-11-12 02:14:26,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:26,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650983537] [2023-11-12 02:14:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650983537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 02:14:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130871309] [2023-11-12 02:14:26,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:14:26,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:14:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:26,961 INFO L87 Difference]: Start difference. First operand 178 states and 282 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:29,616 INFO L93 Difference]: Finished difference Result 755 states and 1185 transitions. [2023-11-12 02:14:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:14:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 170 [2023-11-12 02:14:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:29,624 INFO L225 Difference]: With dead ends: 755 [2023-11-12 02:14:29,624 INFO L226 Difference]: Without dead ends: 580 [2023-11-12 02:14:29,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:14:29,630 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 387 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:29,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 949 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-12 02:14:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-11-12 02:14:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 274. [2023-11-12 02:14:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 213 states have (on average 1.4929577464788732) internal successors, (318), 214 states have internal predecessors, (318), 56 states have call successors, (56), 4 states have call predecessors, (56), 4 states have return successors, (56), 55 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-12 02:14:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 430 transitions. [2023-11-12 02:14:29,703 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 430 transitions. Word has length 170 [2023-11-12 02:14:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:29,705 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 430 transitions. [2023-11-12 02:14:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 430 transitions. [2023-11-12 02:14:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:14:29,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:29,709 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:29,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:29,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:29,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:29,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1021935928, now seen corresponding path program 1 times [2023-11-12 02:14:29,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:29,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15279687] [2023-11-12 02:14:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:29,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:29,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:29,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608924816] [2023-11-12 02:14:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:29,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:29,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:30,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:14:30,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:30,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15279687] [2023-11-12 02:14:30,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608924816] [2023-11-12 02:14:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608924816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:30,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704398454] [2023-11-12 02:14:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:30,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:30,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:30,212 INFO L87 Difference]: Start difference. First operand 274 states and 430 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:30,396 INFO L93 Difference]: Finished difference Result 561 states and 874 transitions. [2023-11-12 02:14:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 170 [2023-11-12 02:14:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:30,402 INFO L225 Difference]: With dead ends: 561 [2023-11-12 02:14:30,402 INFO L226 Difference]: Without dead ends: 386 [2023-11-12 02:14:30,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 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 02:14:30,404 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 98 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:30,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 364 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-12 02:14:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2023-11-12 02:14:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 310 states have (on average 1.4838709677419355) internal successors, (460), 313 states have internal predecessors, (460), 64 states have call successors, (64), 7 states have call predecessors, (64), 7 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 588 transitions. [2023-11-12 02:14:30,434 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 588 transitions. Word has length 170 [2023-11-12 02:14:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 588 transitions. [2023-11-12 02:14:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 588 transitions. [2023-11-12 02:14:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:14:30,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:30,439 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:30,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:30,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:30,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1040698528, now seen corresponding path program 1 times [2023-11-12 02:14:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:30,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038734223] [2023-11-12 02:14:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:30,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737821268] [2023-11-12 02:14:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:30,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:30,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:30,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:30,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:14:30,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:32,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:32,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038734223] [2023-11-12 02:14:32,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:32,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737821268] [2023-11-12 02:14:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737821268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:14:32,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904948691] [2023-11-12 02:14:32,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:32,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:32,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:32,241 INFO L87 Difference]: Start difference. First operand 382 states and 588 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:32,873 INFO L93 Difference]: Finished difference Result 1004 states and 1556 transitions. [2023-11-12 02:14:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:14:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 170 [2023-11-12 02:14:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:32,886 INFO L225 Difference]: With dead ends: 1004 [2023-11-12 02:14:32,886 INFO L226 Difference]: Without dead ends: 725 [2023-11-12 02:14:32,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:14:32,889 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 354 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:32,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 485 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2023-11-12 02:14:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 382. [2023-11-12 02:14:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 310 states have (on average 1.4838709677419355) internal successors, (460), 313 states have internal predecessors, (460), 64 states have call successors, (64), 7 states have call predecessors, (64), 7 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 588 transitions. [2023-11-12 02:14:32,936 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 588 transitions. Word has length 170 [2023-11-12 02:14:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:32,937 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 588 transitions. [2023-11-12 02:14:32,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 588 transitions. [2023-11-12 02:14:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 02:14:32,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:32,940 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:32,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:33,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:33,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:33,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -532576798, now seen corresponding path program 1 times [2023-11-12 02:14:33,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:33,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41423477] [2023-11-12 02:14:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:33,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:33,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108303369] [2023-11-12 02:14:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:33,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:33,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:33,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:33,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:33,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:14:33,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 204 proven. 66 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2023-11-12 02:14:34,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-11-12 02:14:36,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41423477] [2023-11-12 02:14:36,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108303369] [2023-11-12 02:14:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108303369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:36,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:36,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-12 02:14:36,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770158601] [2023-11-12 02:14:36,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:36,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:14:36,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:14:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:14:36,458 INFO L87 Difference]: Start difference. First operand 382 states and 588 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 4 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (50), 4 states have call predecessors, (50), 4 states have call successors, (50) [2023-11-12 02:14:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:37,894 INFO L93 Difference]: Finished difference Result 1016 states and 1559 transitions. [2023-11-12 02:14:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:14:37,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 4 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (50), 4 states have call predecessors, (50), 4 states have call successors, (50) Word has length 171 [2023-11-12 02:14:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:37,901 INFO L225 Difference]: With dead ends: 1016 [2023-11-12 02:14:37,901 INFO L226 Difference]: Without dead ends: 705 [2023-11-12 02:14:37,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 02:14:37,904 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 460 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:37,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 860 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:14:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-11-12 02:14:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 446. [2023-11-12 02:14:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 372 states have (on average 1.4973118279569892) internal successors, (557), 375 states have internal predecessors, (557), 64 states have call successors, (64), 9 states have call predecessors, (64), 9 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 685 transitions. [2023-11-12 02:14:37,956 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 685 transitions. Word has length 171 [2023-11-12 02:14:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:37,957 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 685 transitions. [2023-11-12 02:14:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 4 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (50), 4 states have call predecessors, (50), 4 states have call successors, (50) [2023-11-12 02:14:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 685 transitions. [2023-11-12 02:14:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 02:14:37,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:37,961 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:37,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:38,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:38,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:38,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1350671706, now seen corresponding path program 1 times [2023-11-12 02:14:38,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:38,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817082182] [2023-11-12 02:14:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:38,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:38,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931950413] [2023-11-12 02:14:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:38,220 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:38,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:38,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:38,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817082182] [2023-11-12 02:14:38,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:38,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931950413] [2023-11-12 02:14:38,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931950413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:38,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:38,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372961338] [2023-11-12 02:14:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:38,482 INFO L87 Difference]: Start difference. First operand 446 states and 685 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:38,670 INFO L93 Difference]: Finished difference Result 733 states and 1130 transitions. [2023-11-12 02:14:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 171 [2023-11-12 02:14:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:38,676 INFO L225 Difference]: With dead ends: 733 [2023-11-12 02:14:38,676 INFO L226 Difference]: Without dead ends: 454 [2023-11-12 02:14:38,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 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 02:14:38,678 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 60 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:38,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 394 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-11-12 02:14:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2023-11-12 02:14:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 376 states have (on average 1.4920212765957446) internal successors, (561), 379 states have internal predecessors, (561), 64 states have call successors, (64), 9 states have call predecessors, (64), 9 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 689 transitions. [2023-11-12 02:14:38,731 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 689 transitions. Word has length 171 [2023-11-12 02:14:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:38,732 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 689 transitions. [2023-11-12 02:14:38,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 689 transitions. [2023-11-12 02:14:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 02:14:38,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:38,737 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:38,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,944 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:38,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash -761166611, now seen corresponding path program 1 times [2023-11-12 02:14:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921172120] [2023-11-12 02:14:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:38,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:38,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60339787] [2023-11-12 02:14:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:38,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:38,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:38,995 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:39,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:14:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:39,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:14:39,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:40,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:40,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921172120] [2023-11-12 02:14:40,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:40,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60339787] [2023-11-12 02:14:40,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60339787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:40,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:40,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:14:40,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477774929] [2023-11-12 02:14:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:14:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:14:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:40,032 INFO L87 Difference]: Start difference. First operand 450 states and 689 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:41,831 INFO L93 Difference]: Finished difference Result 1148 states and 1761 transitions. [2023-11-12 02:14:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:14:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 171 [2023-11-12 02:14:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:41,838 INFO L225 Difference]: With dead ends: 1148 [2023-11-12 02:14:41,838 INFO L226 Difference]: Without dead ends: 865 [2023-11-12 02:14:41,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:14:41,840 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 400 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:41,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 561 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:14:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-12 02:14:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 450. [2023-11-12 02:14:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 376 states have (on average 1.4920212765957446) internal successors, (561), 379 states have internal predecessors, (561), 64 states have call successors, (64), 9 states have call predecessors, (64), 9 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 689 transitions. [2023-11-12 02:14:41,888 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 689 transitions. Word has length 171 [2023-11-12 02:14:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:41,889 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 689 transitions. [2023-11-12 02:14:41,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 689 transitions. [2023-11-12 02:14:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 02:14:41,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:41,892 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:41,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:42,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:42,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:42,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash -588566660, now seen corresponding path program 1 times [2023-11-12 02:14:42,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:42,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667784335] [2023-11-12 02:14:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:42,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:42,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414633376] [2023-11-12 02:14:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:42,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:42,139 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:42,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:14:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:42,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:14:42,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:42,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:42,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:42,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667784335] [2023-11-12 02:14:42,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:42,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414633376] [2023-11-12 02:14:42,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414633376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:42,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:42,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:14:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791467673] [2023-11-12 02:14:42,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:42,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:42,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:42,996 INFO L87 Difference]: Start difference. First operand 450 states and 689 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:43,993 INFO L93 Difference]: Finished difference Result 1299 states and 2017 transitions. [2023-11-12 02:14:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:14:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 171 [2023-11-12 02:14:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:44,001 INFO L225 Difference]: With dead ends: 1299 [2023-11-12 02:14:44,001 INFO L226 Difference]: Without dead ends: 938 [2023-11-12 02:14:44,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:14:44,003 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 199 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:44,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 619 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:14:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2023-11-12 02:14:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 455. [2023-11-12 02:14:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 381 states have (on average 1.4934383202099737) internal successors, (569), 384 states have internal predecessors, (569), 64 states have call successors, (64), 9 states have call predecessors, (64), 9 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 697 transitions. [2023-11-12 02:14:44,048 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 697 transitions. Word has length 171 [2023-11-12 02:14:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:44,049 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 697 transitions. [2023-11-12 02:14:44,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 697 transitions. [2023-11-12 02:14:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 02:14:44,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:44,052 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:14:44,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:44,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -448018050, now seen corresponding path program 1 times [2023-11-12 02:14:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667317142] [2023-11-12 02:14:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:44,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:44,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322865535] [2023-11-12 02:14:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:44,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:44,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:44,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:14:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:44,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:14:44,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-12 02:14:45,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:45,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667317142] [2023-11-12 02:14:45,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322865535] [2023-11-12 02:14:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322865535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:45,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:45,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:14:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343507608] [2023-11-12 02:14:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:45,045 INFO L87 Difference]: Start difference. First operand 455 states and 697 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:46,023 INFO L93 Difference]: Finished difference Result 1261 states and 1955 transitions. [2023-11-12 02:14:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:14:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 171 [2023-11-12 02:14:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:46,030 INFO L225 Difference]: With dead ends: 1261 [2023-11-12 02:14:46,030 INFO L226 Difference]: Without dead ends: 900 [2023-11-12 02:14:46,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:14:46,032 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 258 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:46,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 524 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2023-11-12 02:14:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 407. [2023-11-12 02:14:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 333 states have (on average 1.4744744744744744) internal successors, (491), 336 states have internal predecessors, (491), 64 states have call successors, (64), 9 states have call predecessors, (64), 9 states have return successors, (64), 61 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-12 02:14:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 619 transitions. [2023-11-12 02:14:46,077 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 619 transitions. Word has length 171 [2023-11-12 02:14:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:46,078 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 619 transitions. [2023-11-12 02:14:46,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (25), 1 states have call predecessors, (25), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-12 02:14:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 619 transitions. [2023-11-12 02:14:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-12 02:14:46,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:46,080 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:46,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:46,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:14:46,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:46,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1226158271, now seen corresponding path program 1 times [2023-11-12 02:14:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:46,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076301444] [2023-11-12 02:14:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:46,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:46,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493088165] [2023-11-12 02:14:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:46,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:46,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:46,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17ef37e5-06ad-41f2-a8ca-bacdc3bae274/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:14:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:46,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:14:46,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 602 proven. 159 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-11-12 02:14:48,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 96 proven. 111 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2023-11-12 02:14:55,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076301444] [2023-11-12 02:14:55,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493088165] [2023-11-12 02:14:55,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493088165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:55,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:55,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2023-11-12 02:14:55,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115688023] [2023-11-12 02:14:55,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:14:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:14:55,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:14:55,270 INFO L87 Difference]: Start difference. First operand 407 states and 619 transitions. Second operand has 31 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 8 states have call successors, (49), 5 states have call predecessors, (49), 11 states have return successors, (50), 7 states have call predecessors, (50), 8 states have call successors, (50)