./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72bf3c0845cdd2bb0ceb7773d767081845ae984de3bbd8e14ca740b1ff59160d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:54:22,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:54:22,130 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:54:22,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:54:22,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:54:22,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:54:22,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:54:22,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:54:22,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:54:22,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:54:22,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:54:22,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:54:22,188 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:54:22,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:54:22,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:54:22,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:54:22,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:54:22,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:54:22,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:54:22,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:54:22,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:54:22,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:54:22,209 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:54:22,209 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:54:22,210 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:54:22,211 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:54:22,211 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:54:22,212 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:54:22,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:22,213 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:54:22,214 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:54:22,214 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:54:22,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:54:22,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:54:22,215 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:54:22,215 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:54:22,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:54:22,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:54:22,216 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:54:22,216 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_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72bf3c0845cdd2bb0ceb7773d767081845ae984de3bbd8e14ca740b1ff59160d [2023-11-06 21:54:22,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:54:22,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:54:22,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:54:22,583 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:54:22,584 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:54:22,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i [2023-11-06 21:54:25,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:54:26,372 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:54:26,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i [2023-11-06 21:54:26,389 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/data/39e5cde91/a8000c179a89407f83fde2aa24ad9f62/FLAG8f5b28c2b [2023-11-06 21:54:26,405 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/data/39e5cde91/a8000c179a89407f83fde2aa24ad9f62 [2023-11-06 21:54:26,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:54:26,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:54:26,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:26,412 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:54:26,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:54:26,418 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787e682d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:26, skipping insertion in model container [2023-11-06 21:54:26,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:54:26" (1/1) ... [2023-11-06 21:54:26,487 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:54:26,674 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_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i[916,929] [2023-11-06 21:54:27,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:27,041 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:54:27,055 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_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-79.i[916,929] [2023-11-06 21:54:27,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:54:27,232 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:54:27,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27 WrapperNode [2023-11-06 21:54:27,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:54:27,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:27,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:54:27,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:54:27,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,562 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 746 [2023-11-06 21:54:27,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:54:27,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:54:27,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:54:27,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:54:27,574 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,686 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:54:27,735 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:54:27,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:54:27,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:54:27,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (1/1) ... [2023-11-06 21:54:27,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:27,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:54:27,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:54:27,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:54:27,833 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:54:27,833 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:54:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:54:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:54:27,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:54:28,055 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:54:28,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:54:29,475 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:54:29,493 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:54:29,493 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:54:29,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:29 BoogieIcfgContainer [2023-11-06 21:54:29,497 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:54:29,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:54:29,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:54:29,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:54:29,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:54:26" (1/3) ... [2023-11-06 21:54:29,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3801613e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:29, skipping insertion in model container [2023-11-06 21:54:29,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:54:27" (2/3) ... [2023-11-06 21:54:29,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3801613e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:29, skipping insertion in model container [2023-11-06 21:54:29,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:29" (3/3) ... [2023-11-06 21:54:29,511 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-79.i [2023-11-06 21:54:29,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:54:29,536 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:54:29,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:29,649 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35e1803c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:29,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:54:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 220 states have (on average 1.6136363636363635) internal successors, (355), 221 states have internal predecessors, (355), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 21:54:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 21:54:29,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:29,690 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:29,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:29,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 769709991, now seen corresponding path program 1 times [2023-11-06 21:54:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085639452] [2023-11-06 21:54:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:30,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:30,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085639452] [2023-11-06 21:54:30,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:54:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634978594] [2023-11-06 21:54:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:30,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:30,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:54:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:30,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:54:30,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2023-11-06 21:54:30,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634978594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:30,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:30,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:30,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316922991] [2023-11-06 21:54:30,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:54:30,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:54:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:54:30,957 INFO L87 Difference]: Start difference. First operand has 285 states, 220 states have (on average 1.6136363636363635) internal successors, (355), 221 states have internal predecessors, (355), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 21:54:31,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:31,041 INFO L93 Difference]: Finished difference Result 560 states and 1009 transitions. [2023-11-06 21:54:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:54:31,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) Word has length 437 [2023-11-06 21:54:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:31,055 INFO L225 Difference]: With dead ends: 560 [2023-11-06 21:54:31,055 INFO L226 Difference]: Without dead ends: 278 [2023-11-06 21:54:31,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:54:31,065 INFO L413 NwaCegarLoop]: 466 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, 466 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:31,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:54:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-06 21:54:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2023-11-06 21:54:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 214 states have (on average 1.5981308411214954) internal successors, (342), 214 states have internal predecessors, (342), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 21:54:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 466 transitions. [2023-11-06 21:54:31,169 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 466 transitions. Word has length 437 [2023-11-06 21:54:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:31,170 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 466 transitions. [2023-11-06 21:54:31,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 21:54:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 466 transitions. [2023-11-06 21:54:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 21:54:31,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:31,193 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:31,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:31,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:54:31,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:31,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash 435783091, now seen corresponding path program 1 times [2023-11-06 21:54:31,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:31,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183873131] [2023-11-06 21:54:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:31,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:31,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543309336] [2023-11-06 21:54:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:31,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:31,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:31,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:54:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:32,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:32,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:32,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183873131] [2023-11-06 21:54:32,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543309336] [2023-11-06 21:54:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543309336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:32,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:32,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936340602] [2023-11-06 21:54:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:32,359 INFO L87 Difference]: Start difference. First operand 278 states and 466 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:32,994 INFO L93 Difference]: Finished difference Result 970 states and 1628 transitions. [2023-11-06 21:54:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:32,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 437 [2023-11-06 21:54:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:33,004 INFO L225 Difference]: With dead ends: 970 [2023-11-06 21:54:33,005 INFO L226 Difference]: Without dead ends: 695 [2023-11-06 21:54:33,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:33,008 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 691 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:33,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1450 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:54:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2023-11-06 21:54:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 690. [2023-11-06 21:54:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 556 states have (on average 1.580935251798561) internal successors, (879), 557 states have internal predecessors, (879), 130 states have call successors, (130), 3 states have call predecessors, (130), 3 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-06 21:54:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1139 transitions. [2023-11-06 21:54:33,125 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1139 transitions. Word has length 437 [2023-11-06 21:54:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:33,127 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1139 transitions. [2023-11-06 21:54:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1139 transitions. [2023-11-06 21:54:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 21:54:33,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:33,134 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:33,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:33,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:33,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 28963379, now seen corresponding path program 1 times [2023-11-06 21:54:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:33,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741743762] [2023-11-06 21:54:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:33,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:33,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991918688] [2023-11-06 21:54:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:33,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:33,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:33,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:54:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:33,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:33,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:39,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:39,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741743762] [2023-11-06 21:54:39,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991918688] [2023-11-06 21:54:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991918688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:39,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:54:39,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912629677] [2023-11-06 21:54:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:54:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:54:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:54:39,459 INFO L87 Difference]: Start difference. First operand 690 states and 1139 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:40,334 INFO L93 Difference]: Finished difference Result 1584 states and 2619 transitions. [2023-11-06 21:54:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:54:40,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 437 [2023-11-06 21:54:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:40,349 INFO L225 Difference]: With dead ends: 1584 [2023-11-06 21:54:40,349 INFO L226 Difference]: Without dead ends: 897 [2023-11-06 21:54:40,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:40,356 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 1135 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 3590 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:40,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 3590 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:54:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-11-06 21:54:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 843. [2023-11-06 21:54:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 702 states have (on average 1.5712250712250713) internal successors, (1103), 704 states have internal predecessors, (1103), 136 states have call successors, (136), 4 states have call predecessors, (136), 4 states have return successors, (136), 134 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-06 21:54:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1375 transitions. [2023-11-06 21:54:40,493 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1375 transitions. Word has length 437 [2023-11-06 21:54:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:40,495 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1375 transitions. [2023-11-06 21:54:40,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1375 transitions. [2023-11-06 21:54:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 21:54:40,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:40,502 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:40,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:40,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:40,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:40,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1995268781, now seen corresponding path program 1 times [2023-11-06 21:54:40,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:40,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339340000] [2023-11-06 21:54:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:40,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:40,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268353260] [2023-11-06 21:54:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:40,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:40,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:54:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:41,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:54:41,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:41,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:41,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:41,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339340000] [2023-11-06 21:54:41,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:41,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268353260] [2023-11-06 21:54:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268353260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:41,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:41,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253250033] [2023-11-06 21:54:41,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:41,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:41,418 INFO L87 Difference]: Start difference. First operand 843 states and 1375 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:41,602 INFO L93 Difference]: Finished difference Result 2344 states and 3823 transitions. [2023-11-06 21:54:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 439 [2023-11-06 21:54:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:41,625 INFO L225 Difference]: With dead ends: 2344 [2023-11-06 21:54:41,626 INFO L226 Difference]: Without dead ends: 1504 [2023-11-06 21:54:41,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:41,635 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 300 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:41,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 942 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:54:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2023-11-06 21:54:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1500. [2023-11-06 21:54:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1323 states have (on average 1.5873015873015872) internal successors, (2100), 1329 states have internal predecessors, (2100), 168 states have call successors, (168), 8 states have call predecessors, (168), 8 states have return successors, (168), 162 states have call predecessors, (168), 168 states have call successors, (168) [2023-11-06 21:54:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2436 transitions. [2023-11-06 21:54:41,824 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2436 transitions. Word has length 439 [2023-11-06 21:54:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:41,826 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 2436 transitions. [2023-11-06 21:54:41,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2436 transitions. [2023-11-06 21:54:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 21:54:41,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:41,836 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:41,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:42,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:42,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:42,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash -912913105, now seen corresponding path program 1 times [2023-11-06 21:54:42,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:42,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064861389] [2023-11-06 21:54:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:42,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361835321] [2023-11-06 21:54:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:42,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:42,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:42,159 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:42,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:54:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:42,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:54:42,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:42,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:42,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064861389] [2023-11-06 21:54:42,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:42,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361835321] [2023-11-06 21:54:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361835321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:42,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:42,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566421017] [2023-11-06 21:54:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:42,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:42,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:42,755 INFO L87 Difference]: Start difference. First operand 1500 states and 2436 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:42,945 INFO L93 Difference]: Finished difference Result 3196 states and 5192 transitions. [2023-11-06 21:54:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:42,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 439 [2023-11-06 21:54:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:42,958 INFO L225 Difference]: With dead ends: 3196 [2023-11-06 21:54:42,958 INFO L226 Difference]: Without dead ends: 1699 [2023-11-06 21:54:42,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:42,964 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 410 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:42,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 856 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:54:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2023-11-06 21:54:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1583. [2023-11-06 21:54:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1342 states have (on average 1.5044709388971684) internal successors, (2019), 1349 states have internal predecessors, (2019), 230 states have call successors, (230), 10 states have call predecessors, (230), 10 states have return successors, (230), 223 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-06 21:54:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2479 transitions. [2023-11-06 21:54:43,147 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2479 transitions. Word has length 439 [2023-11-06 21:54:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:43,148 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2479 transitions. [2023-11-06 21:54:43,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2479 transitions. [2023-11-06 21:54:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-11-06 21:54:43,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:43,156 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:43,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:43,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:43,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:43,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1683565015, now seen corresponding path program 1 times [2023-11-06 21:54:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459478949] [2023-11-06 21:54:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:43,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:43,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37016787] [2023-11-06 21:54:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:43,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:43,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:43,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:43,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:54:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:43,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:54:43,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 2437 proven. 147 refuted. 0 times theorem prover too weak. 4980 trivial. 0 not checked. [2023-11-06 21:54:45,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 36 proven. 147 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 21:54:45,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:45,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459478949] [2023-11-06 21:54:45,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:45,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37016787] [2023-11-06 21:54:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37016787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:45,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:45,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 21:54:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775362061] [2023-11-06 21:54:45,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:54:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:54:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:54:45,799 INFO L87 Difference]: Start difference. First operand 1583 states and 2479 transitions. Second operand has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2023-11-06 21:54:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:48,102 INFO L93 Difference]: Finished difference Result 5516 states and 8645 transitions. [2023-11-06 21:54:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:54:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) Word has length 440 [2023-11-06 21:54:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:48,130 INFO L225 Difference]: With dead ends: 5516 [2023-11-06 21:54:48,131 INFO L226 Difference]: Without dead ends: 4043 [2023-11-06 21:54:48,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:48,137 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 2767 mSDsluCounter, 3441 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2828 SdHoareTripleChecker+Valid, 3868 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:48,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2828 Valid, 3868 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 21:54:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2023-11-06 21:54:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 2353. [2023-11-06 21:54:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2022 states have (on average 1.5084075173095945) internal successors, (3050), 2031 states have internal predecessors, (3050), 314 states have call successors, (314), 16 states have call predecessors, (314), 16 states have return successors, (314), 305 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-06 21:54:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 3678 transitions. [2023-11-06 21:54:48,517 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 3678 transitions. Word has length 440 [2023-11-06 21:54:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:48,519 INFO L495 AbstractCegarLoop]: Abstraction has 2353 states and 3678 transitions. [2023-11-06 21:54:48,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2023-11-06 21:54:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 3678 transitions. [2023-11-06 21:54:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-11-06 21:54:48,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:48,527 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:48,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:48,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:54:48,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:48,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 964121138, now seen corresponding path program 1 times [2023-11-06 21:54:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108742558] [2023-11-06 21:54:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:48,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:48,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937311232] [2023-11-06 21:54:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:48,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:48,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:48,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:54:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:49,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:54:49,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:50,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108742558] [2023-11-06 21:54:50,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937311232] [2023-11-06 21:54:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937311232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:50,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:50,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68465738] [2023-11-06 21:54:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:54:50,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:54:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:50,131 INFO L87 Difference]: Start difference. First operand 2353 states and 3678 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:50,881 INFO L93 Difference]: Finished difference Result 5938 states and 9294 transitions. [2023-11-06 21:54:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 441 [2023-11-06 21:54:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:50,912 INFO L225 Difference]: With dead ends: 5938 [2023-11-06 21:54:50,912 INFO L226 Difference]: Without dead ends: 3702 [2023-11-06 21:54:50,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:50,919 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 356 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:50,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1594 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:54:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2023-11-06 21:54:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3532. [2023-11-06 21:54:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3532 states, 3201 states have (on average 1.5382692908466105) internal successors, (4924), 3210 states have internal predecessors, (4924), 314 states have call successors, (314), 16 states have call predecessors, (314), 16 states have return successors, (314), 305 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-06 21:54:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3532 states to 3532 states and 5552 transitions. [2023-11-06 21:54:51,327 INFO L78 Accepts]: Start accepts. Automaton has 3532 states and 5552 transitions. Word has length 441 [2023-11-06 21:54:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:51,328 INFO L495 AbstractCegarLoop]: Abstraction has 3532 states and 5552 transitions. [2023-11-06 21:54:51,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3532 states and 5552 transitions. [2023-11-06 21:54:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 21:54:51,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:51,337 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:51,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:51,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:51,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:51,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1587119987, now seen corresponding path program 1 times [2023-11-06 21:54:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:51,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448672038] [2023-11-06 21:54:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:51,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420505214] [2023-11-06 21:54:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:51,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:51,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:51,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:54:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:52,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:54:52,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:52,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:52,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:52,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448672038] [2023-11-06 21:54:52,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:52,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420505214] [2023-11-06 21:54:52,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420505214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:52,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689735452] [2023-11-06 21:54:52,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:52,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:54:52,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:54:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:52,847 INFO L87 Difference]: Start difference. First operand 3532 states and 5552 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:53,431 INFO L93 Difference]: Finished difference Result 7048 states and 11032 transitions. [2023-11-06 21:54:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 443 [2023-11-06 21:54:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:53,458 INFO L225 Difference]: With dead ends: 7048 [2023-11-06 21:54:53,458 INFO L226 Difference]: Without dead ends: 3674 [2023-11-06 21:54:53,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:53,466 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 561 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:53,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1766 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:54:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-11-06 21:54:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3540. [2023-11-06 21:54:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3209 states have (on average 1.534434403240885) internal successors, (4924), 3218 states have internal predecessors, (4924), 314 states have call successors, (314), 16 states have call predecessors, (314), 16 states have return successors, (314), 305 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-06 21:54:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 5552 transitions. [2023-11-06 21:54:53,768 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 5552 transitions. Word has length 443 [2023-11-06 21:54:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:53,769 INFO L495 AbstractCegarLoop]: Abstraction has 3540 states and 5552 transitions. [2023-11-06 21:54:53,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:54:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 5552 transitions. [2023-11-06 21:54:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 21:54:53,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:53,777 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:53,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:53,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:53,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:53,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:53,986 INFO L85 PathProgramCache]: Analyzing trace with hash -528194241, now seen corresponding path program 1 times [2023-11-06 21:54:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:53,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021160713] [2023-11-06 21:54:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:53,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:54,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:54,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078306390] [2023-11-06 21:54:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:54,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:54,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:54,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:54:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:54,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:54,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 1951 proven. 156 refuted. 0 times theorem prover too weak. 5457 trivial. 0 not checked. [2023-11-06 21:54:55,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 21:54:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:55,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021160713] [2023-11-06 21:54:55,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078306390] [2023-11-06 21:54:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078306390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:55,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:55,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:55,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385510027] [2023-11-06 21:54:55,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:55,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:55,698 INFO L87 Difference]: Start difference. First operand 3540 states and 5552 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 21:54:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:56,341 INFO L93 Difference]: Finished difference Result 6744 states and 10570 transitions. [2023-11-06 21:54:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:56,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 443 [2023-11-06 21:54:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:56,366 INFO L225 Difference]: With dead ends: 6744 [2023-11-06 21:54:56,366 INFO L226 Difference]: Without dead ends: 3610 [2023-11-06 21:54:56,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:56,374 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 519 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:56,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1003 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:54:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2023-11-06 21:54:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3547. [2023-11-06 21:54:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3218 states have (on average 1.5205096333126165) internal successors, (4893), 3227 states have internal predecessors, (4893), 308 states have call successors, (308), 20 states have call predecessors, (308), 20 states have return successors, (308), 299 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 21:54:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 5509 transitions. [2023-11-06 21:54:56,670 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 5509 transitions. Word has length 443 [2023-11-06 21:54:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:56,671 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 5509 transitions. [2023-11-06 21:54:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 21:54:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 5509 transitions. [2023-11-06 21:54:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 21:54:56,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:56,678 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:56,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:56,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:56,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:56,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:56,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1447083145, now seen corresponding path program 1 times [2023-11-06 21:54:56,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:56,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62055793] [2023-11-06 21:54:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:56,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680605012] [2023-11-06 21:54:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:56,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:56,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:54:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:57,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:54:57,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:54:58,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62055793] [2023-11-06 21:54:58,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680605012] [2023-11-06 21:54:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680605012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:58,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:58,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:54:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924786632] [2023-11-06 21:54:58,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:54:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:54:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:54:58,662 INFO L87 Difference]: Start difference. First operand 3547 states and 5509 transitions. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 9 states have internal predecessors, (137), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:55:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:01,021 INFO L93 Difference]: Finished difference Result 6738 states and 10408 transitions. [2023-11-06 21:55:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:55:01,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 9 states have internal predecessors, (137), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 444 [2023-11-06 21:55:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:01,085 INFO L225 Difference]: With dead ends: 6738 [2023-11-06 21:55:01,093 INFO L226 Difference]: Without dead ends: 3753 [2023-11-06 21:55:01,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:55:01,100 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 2655 mSDsluCounter, 2788 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2655 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:01,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2655 Valid, 3513 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 21:55:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2023-11-06 21:55:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 3173. [2023-11-06 21:55:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 2844 states have (on average 1.5158227848101267) internal successors, (4311), 2853 states have internal predecessors, (4311), 308 states have call successors, (308), 20 states have call predecessors, (308), 20 states have return successors, (308), 299 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 21:55:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 4927 transitions. [2023-11-06 21:55:01,438 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 4927 transitions. Word has length 444 [2023-11-06 21:55:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:01,439 INFO L495 AbstractCegarLoop]: Abstraction has 3173 states and 4927 transitions. [2023-11-06 21:55:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 9 states have internal predecessors, (137), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:55:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 4927 transitions. [2023-11-06 21:55:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 21:55:01,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:01,447 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:01,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:01,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:55:01,657 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:01,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 109265097, now seen corresponding path program 1 times [2023-11-06 21:55:01,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:01,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364496063] [2023-11-06 21:55:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:01,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:01,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:01,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570784155] [2023-11-06 21:55:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:01,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:01,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:01,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:01,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:55:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:02,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:55:02,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 2283 proven. 150 refuted. 0 times theorem prover too weak. 5131 trivial. 0 not checked. [2023-11-06 21:55:02,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 33 proven. 150 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 21:55:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364496063] [2023-11-06 21:55:03,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570784155] [2023-11-06 21:55:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570784155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:03,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:03,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:55:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016488084] [2023-11-06 21:55:03,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:03,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:55:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:55:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:55:03,375 INFO L87 Difference]: Start difference. First operand 3173 states and 4927 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-06 21:55:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:04,047 INFO L93 Difference]: Finished difference Result 4797 states and 7426 transitions. [2023-11-06 21:55:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:55:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 444 [2023-11-06 21:55:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:04,062 INFO L225 Difference]: With dead ends: 4797 [2023-11-06 21:55:04,063 INFO L226 Difference]: Without dead ends: 2054 [2023-11-06 21:55:04,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 880 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:55:04,069 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 548 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:04,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 982 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:55:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2023-11-06 21:55:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1873. [2023-11-06 21:55:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1585 states have (on average 1.478864353312303) internal successors, (2344), 1588 states have internal predecessors, (2344), 266 states have call successors, (266), 21 states have call predecessors, (266), 21 states have return successors, (266), 263 states have call predecessors, (266), 266 states have call successors, (266) [2023-11-06 21:55:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2876 transitions. [2023-11-06 21:55:04,312 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2876 transitions. Word has length 444 [2023-11-06 21:55:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:04,313 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2876 transitions. [2023-11-06 21:55:04,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 2 states have call successors, (112), 2 states have call predecessors, (112), 4 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2023-11-06 21:55:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2876 transitions. [2023-11-06 21:55:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 21:55:04,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:04,319 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:04,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:04,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:55:04,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:04,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:04,530 INFO L85 PathProgramCache]: Analyzing trace with hash 563574155, now seen corresponding path program 1 times [2023-11-06 21:55:04,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:04,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941530085] [2023-11-06 21:55:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:04,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:04,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:04,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20243474] [2023-11-06 21:55:04,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:04,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:04,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:04,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:04,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:55:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:05,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:55:05,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 21:55:06,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941530085] [2023-11-06 21:55:06,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:06,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20243474] [2023-11-06 21:55:06,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20243474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:06,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:06,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989846514] [2023-11-06 21:55:06,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:55:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:55:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:06,591 INFO L87 Difference]: Start difference. First operand 1873 states and 2876 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:55:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:07,072 INFO L93 Difference]: Finished difference Result 3648 states and 5590 transitions. [2023-11-06 21:55:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 444 [2023-11-06 21:55:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:07,080 INFO L225 Difference]: With dead ends: 3648 [2023-11-06 21:55:07,080 INFO L226 Difference]: Without dead ends: 1919 [2023-11-06 21:55:07,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:07,085 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 334 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:07,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 1275 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:55:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2023-11-06 21:55:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1873. [2023-11-06 21:55:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1585 states have (on average 1.4769716088328075) internal successors, (2341), 1588 states have internal predecessors, (2341), 266 states have call successors, (266), 21 states have call predecessors, (266), 21 states have return successors, (266), 263 states have call predecessors, (266), 266 states have call successors, (266) [2023-11-06 21:55:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2873 transitions. [2023-11-06 21:55:07,312 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2873 transitions. Word has length 444 [2023-11-06 21:55:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:07,313 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2873 transitions. [2023-11-06 21:55:07,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 21:55:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2873 transitions. [2023-11-06 21:55:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 21:55:07,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:07,319 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:07,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:07,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:55:07,530 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:07,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -22702067, now seen corresponding path program 1 times [2023-11-06 21:55:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:07,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933496271] [2023-11-06 21:55:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:07,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:07,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470160999] [2023-11-06 21:55:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:07,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:07,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:55:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:08,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:55:08,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3524 proven. 120 refuted. 0 times theorem prover too weak. 3920 trivial. 0 not checked. [2023-11-06 21:55:10,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 240 proven. 123 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2023-11-06 21:55:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933496271] [2023-11-06 21:55:11,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470160999] [2023-11-06 21:55:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470160999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:11,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:11,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 21:55:11,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270023084] [2023-11-06 21:55:11,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:11,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:55:11,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:55:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:55:11,089 INFO L87 Difference]: Start difference. First operand 1873 states and 2873 transitions. Second operand has 18 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) [2023-11-06 21:55:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:13,833 INFO L93 Difference]: Finished difference Result 6207 states and 9435 transitions. [2023-11-06 21:55:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:55:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) Word has length 444 [2023-11-06 21:55:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:13,849 INFO L225 Difference]: With dead ends: 6207 [2023-11-06 21:55:13,849 INFO L226 Difference]: Without dead ends: 4711 [2023-11-06 21:55:13,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=484, Invalid=922, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 21:55:13,855 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1427 mSDsluCounter, 2306 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 2678 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:13,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1466 Valid, 2678 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 21:55:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2023-11-06 21:55:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 4630. [2023-11-06 21:55:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4630 states, 3953 states have (on average 1.4712876296483683) internal successors, (5816), 3965 states have internal predecessors, (5816), 608 states have call successors, (608), 68 states have call predecessors, (608), 68 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-06 21:55:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 7032 transitions. [2023-11-06 21:55:14,347 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 7032 transitions. Word has length 444 [2023-11-06 21:55:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:14,348 INFO L495 AbstractCegarLoop]: Abstraction has 4630 states and 7032 transitions. [2023-11-06 21:55:14,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 15.117647058823529) internal successors, (257), 16 states have internal predecessors, (257), 6 states have call successors, (124), 4 states have call predecessors, (124), 7 states have return successors, (124), 6 states have call predecessors, (124), 6 states have call successors, (124) [2023-11-06 21:55:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 7032 transitions. [2023-11-06 21:55:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 21:55:14,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:14,354 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:14,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:55:14,564 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:14,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash -95088625, now seen corresponding path program 1 times [2023-11-06 21:55:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:14,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383480659] [2023-11-06 21:55:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:14,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:14,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120165281] [2023-11-06 21:55:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:14,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:14,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:14,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:55:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:15,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:55:15,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3469 proven. 351 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2023-11-06 21:55:17,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 180 proven. 360 refuted. 0 times theorem prover too weak. 7024 trivial. 0 not checked. [2023-11-06 21:55:20,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:20,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383480659] [2023-11-06 21:55:20,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:20,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120165281] [2023-11-06 21:55:20,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120165281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:20,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:20,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-06 21:55:20,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106977582] [2023-11-06 21:55:20,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:20,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:55:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:55:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:55:20,382 INFO L87 Difference]: Start difference. First operand 4630 states and 7032 transitions. Second operand has 22 states, 21 states have (on average 10.857142857142858) internal successors, (228), 20 states have internal predecessors, (228), 7 states have call successors, (103), 4 states have call predecessors, (103), 8 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) [2023-11-06 21:55:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:22,503 INFO L93 Difference]: Finished difference Result 9085 states and 13688 transitions. [2023-11-06 21:55:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:55:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 10.857142857142858) internal successors, (228), 20 states have internal predecessors, (228), 7 states have call successors, (103), 4 states have call predecessors, (103), 8 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) Word has length 444 [2023-11-06 21:55:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:22,519 INFO L225 Difference]: With dead ends: 9085 [2023-11-06 21:55:22,520 INFO L226 Difference]: Without dead ends: 4848 [2023-11-06 21:55:22,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 21:55:22,530 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1831 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1831 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:22,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1831 Valid, 1110 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:55:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2023-11-06 21:55:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4750. [2023-11-06 21:55:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4043 states have (on average 1.450902794954242) internal successors, (5866), 4055 states have internal predecessors, (5866), 608 states have call successors, (608), 98 states have call predecessors, (608), 98 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-06 21:55:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 7082 transitions. [2023-11-06 21:55:23,221 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 7082 transitions. Word has length 444 [2023-11-06 21:55:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:23,222 INFO L495 AbstractCegarLoop]: Abstraction has 4750 states and 7082 transitions. [2023-11-06 21:55:23,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 10.857142857142858) internal successors, (228), 20 states have internal predecessors, (228), 7 states have call successors, (103), 4 states have call predecessors, (103), 8 states have return successors, (104), 7 states have call predecessors, (104), 7 states have call successors, (104) [2023-11-06 21:55:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 7082 transitions. [2023-11-06 21:55:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-11-06 21:55:23,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:23,230 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:23,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:55:23,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:23,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -42347245, now seen corresponding path program 1 times [2023-11-06 21:55:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117674811] [2023-11-06 21:55:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:23,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:23,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583468151] [2023-11-06 21:55:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:23,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:23,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:23,522 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:23,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:55:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:25,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:25,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3646 proven. 375 refuted. 0 times theorem prover too weak. 3543 trivial. 0 not checked. [2023-11-06 21:55:30,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 120 proven. 243 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2023-11-06 21:55:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117674811] [2023-11-06 21:55:38,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583468151] [2023-11-06 21:55:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583468151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:38,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:38,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-11-06 21:55:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176781968] [2023-11-06 21:55:38,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:38,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:55:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:55:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:55:38,389 INFO L87 Difference]: Start difference. First operand 4750 states and 7082 transitions. Second operand has 20 states, 19 states have (on average 12.263157894736842) internal successors, (233), 18 states have internal predecessors, (233), 6 states have call successors, (109), 4 states have call predecessors, (109), 8 states have return successors, (110), 6 states have call predecessors, (110), 6 states have call successors, (110) [2023-11-06 21:55:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:41,570 INFO L93 Difference]: Finished difference Result 16209 states and 24573 transitions. [2023-11-06 21:55:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:55:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 12.263157894736842) internal successors, (233), 18 states have internal predecessors, (233), 6 states have call successors, (109), 4 states have call predecessors, (109), 8 states have return successors, (110), 6 states have call predecessors, (110), 6 states have call successors, (110) Word has length 445 [2023-11-06 21:55:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:41,599 INFO L225 Difference]: With dead ends: 16209 [2023-11-06 21:55:41,599 INFO L226 Difference]: Without dead ends: 11918 [2023-11-06 21:55:41,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 872 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 21:55:41,610 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1278 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:41,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 1563 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 21:55:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2023-11-06 21:55:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 6678. [2023-11-06 21:55:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 5951 states have (on average 1.4933624600907411) internal successors, (8887), 5963 states have internal predecessors, (8887), 608 states have call successors, (608), 118 states have call predecessors, (608), 118 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-06 21:55:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 10103 transitions. [2023-11-06 21:55:42,297 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 10103 transitions. Word has length 445 [2023-11-06 21:55:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:42,298 INFO L495 AbstractCegarLoop]: Abstraction has 6678 states and 10103 transitions. [2023-11-06 21:55:42,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 12.263157894736842) internal successors, (233), 18 states have internal predecessors, (233), 6 states have call successors, (109), 4 states have call predecessors, (109), 8 states have return successors, (110), 6 states have call predecessors, (110), 6 states have call successors, (110) [2023-11-06 21:55:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 10103 transitions. [2023-11-06 21:55:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-11-06 21:55:42,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:42,307 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:42,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:55:42,517 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:42,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash -465993967, now seen corresponding path program 1 times [2023-11-06 21:55:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65870979] [2023-11-06 21:55:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:42,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:42,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600794814] [2023-11-06 21:55:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:42,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:42,666 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:42,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:55:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:43,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:55:43,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3160 proven. 96 refuted. 0 times theorem prover too weak. 4308 trivial. 0 not checked. [2023-11-06 21:55:44,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 135 proven. 48 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 21:55:44,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:44,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65870979] [2023-11-06 21:55:44,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:44,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600794814] [2023-11-06 21:55:44,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600794814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:44,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:44,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-06 21:55:44,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821824377] [2023-11-06 21:55:44,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:44,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:55:44,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:55:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:55:44,580 INFO L87 Difference]: Start difference. First operand 6678 states and 10103 transitions. Second operand has 13 states, 13 states have (on average 14.23076923076923) internal successors, (185), 12 states have internal predecessors, (185), 4 states have call successors, (79), 3 states have call predecessors, (79), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-11-06 21:55:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:45,780 INFO L93 Difference]: Finished difference Result 12654 states and 19050 transitions. [2023-11-06 21:55:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:55:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.23076923076923) internal successors, (185), 12 states have internal predecessors, (185), 4 states have call successors, (79), 3 states have call predecessors, (79), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) Word has length 445 [2023-11-06 21:55:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:45,800 INFO L225 Difference]: With dead ends: 12654 [2023-11-06 21:55:45,801 INFO L226 Difference]: Without dead ends: 6832 [2023-11-06 21:55:45,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:55:45,811 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 932 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:45,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1209 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:55:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2023-11-06 21:55:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6734. [2023-11-06 21:55:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6734 states, 5993 states have (on average 1.4874019689637912) internal successors, (8914), 6005 states have internal predecessors, (8914), 608 states have call successors, (608), 132 states have call predecessors, (608), 132 states have return successors, (608), 596 states have call predecessors, (608), 608 states have call successors, (608) [2023-11-06 21:55:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6734 states to 6734 states and 10130 transitions. [2023-11-06 21:55:46,595 INFO L78 Accepts]: Start accepts. Automaton has 6734 states and 10130 transitions. Word has length 445 [2023-11-06 21:55:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:46,596 INFO L495 AbstractCegarLoop]: Abstraction has 6734 states and 10130 transitions. [2023-11-06 21:55:46,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.23076923076923) internal successors, (185), 12 states have internal predecessors, (185), 4 states have call successors, (79), 3 states have call predecessors, (79), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-11-06 21:55:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6734 states and 10130 transitions. [2023-11-06 21:55:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-11-06 21:55:46,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:46,603 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:46,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:55:46,813 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:46,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1804112030, now seen corresponding path program 1 times [2023-11-06 21:55:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581311698] [2023-11-06 21:55:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:46,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:46,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:46,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616922969] [2023-11-06 21:55:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:46,891 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:46,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:55:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:47,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:55:47,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 4130 proven. 216 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2023-11-06 21:55:48,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 144 proven. 219 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2023-11-06 21:55:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581311698] [2023-11-06 21:55:48,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616922969] [2023-11-06 21:55:48,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616922969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:48,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:55:48,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-06 21:55:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88956667] [2023-11-06 21:55:48,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:55:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:55:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:55:48,997 INFO L87 Difference]: Start difference. First operand 6734 states and 10130 transitions. Second operand has 17 states, 16 states have (on average 12.875) internal successors, (206), 17 states have internal predecessors, (206), 6 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) [2023-11-06 21:55:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:50,250 INFO L93 Difference]: Finished difference Result 9044 states and 13465 transitions. [2023-11-06 21:55:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:55:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 12.875) internal successors, (206), 17 states have internal predecessors, (206), 6 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) Word has length 446 [2023-11-06 21:55:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:50,261 INFO L225 Difference]: With dead ends: 9044 [2023-11-06 21:55:50,261 INFO L226 Difference]: Without dead ends: 3174 [2023-11-06 21:55:50,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:55:50,271 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1248 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:50,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 1207 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:55:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2023-11-06 21:55:50,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3096. [2023-11-06 21:55:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 2612 states have (on average 1.4406584992343032) internal successors, (3763), 2619 states have internal predecessors, (3763), 392 states have call successors, (392), 91 states have call predecessors, (392), 91 states have return successors, (392), 385 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-06 21:55:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 4547 transitions. [2023-11-06 21:55:50,701 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 4547 transitions. Word has length 446 [2023-11-06 21:55:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:50,702 INFO L495 AbstractCegarLoop]: Abstraction has 3096 states and 4547 transitions. [2023-11-06 21:55:50,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 12.875) internal successors, (206), 17 states have internal predecessors, (206), 6 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) [2023-11-06 21:55:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 4547 transitions. [2023-11-06 21:55:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-11-06 21:55:50,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:50,707 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:50,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:50,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:55:50,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:50,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash -104345760, now seen corresponding path program 1 times [2023-11-06 21:55:50,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:50,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840351547] [2023-11-06 21:55:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:50,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:50,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038984535] [2023-11-06 21:55:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:50,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:50,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:50,990 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:50,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b874e9d-0473-4400-bc0c-f30fa46d6cd8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:55:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:51,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 21:55:51,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:11,014 WARN L293 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 28 DAG size of output: 24 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-11-06 21:57:07,594 WARN L293 SmtUtils]: Spent 37.13s on a formula simplification. DAG size of input: 101 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:58:05,551 WARN L293 SmtUtils]: Spent 23.40s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:58:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 4393 proven. 591 refuted. 0 times theorem prover too weak. 2580 trivial. 0 not checked. [2023-11-06 21:58:05,676 INFO L327 TraceCheckSpWp]: Computing backward predicates...