./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-74.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-74.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81fdc30d5ae06f4aa0f8c63596e14b99f6ff7b82b4febb712a46f5be02949bcd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:50,646 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:50,775 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:50,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:50,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:50,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:50,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:50,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:50,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:50,840 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:50,841 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:50,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:50,842 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:50,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:50,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:50,844 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:50,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:50,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:50,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:50,846 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:50,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:50,847 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:50,848 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:50,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:50,848 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:50,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:50,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:50,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:50,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:50,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:50,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:50,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:50,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:50,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:50,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:50,853 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:50,854 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:50,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:50,854 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:50,855 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_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81fdc30d5ae06f4aa0f8c63596e14b99f6ff7b82b4febb712a46f5be02949bcd [2023-11-12 02:21:51,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:51,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:51,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:51,168 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:51,169 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:51,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-74.i [2023-11-12 02:21:54,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:54,591 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:54,592 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-74.i [2023-11-12 02:21:54,605 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/data/a430f284a/14dee64c7c524543ab4e76c3cddb71ea/FLAG1f105b5f0 [2023-11-12 02:21:54,625 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/data/a430f284a/14dee64c7c524543ab4e76c3cddb71ea [2023-11-12 02:21:54,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:54,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:54,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:54,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:54,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:54,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:54" (1/1) ... [2023-11-12 02:21:54,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec2e160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:54, skipping insertion in model container [2023-11-12 02:21:54,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:54" (1/1) ... [2023-11-12 02:21:54,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:54,931 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_b64ad62a-f275-4619-8227-6629c8d46c67/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-74.i[916,929] [2023-11-12 02:21:55,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:55,216 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:55,231 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_b64ad62a-f275-4619-8227-6629c8d46c67/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-74.i[916,929] [2023-11-12 02:21:55,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:55,344 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:55,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55 WrapperNode [2023-11-12 02:21:55,345 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:55,348 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:55,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:55,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:55,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,378 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,469 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 440 [2023-11-12 02:21:55,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:55,470 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:55,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:55,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:55,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:55,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:55,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:55,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:55,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (1/1) ... [2023-11-12 02:21:55,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:55,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:55,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:21:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:21:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:55,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:55,844 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:55,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:56,841 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:56,851 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:56,852 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:21:56,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:56 BoogieIcfgContainer [2023-11-12 02:21:56,855 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:56,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:56,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:56,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:56,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:54" (1/3) ... [2023-11-12 02:21:56,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a543020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:56, skipping insertion in model container [2023-11-12 02:21:56,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:55" (2/3) ... [2023-11-12 02:21:56,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a543020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:56, skipping insertion in model container [2023-11-12 02:21:56,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:56" (3/3) ... [2023-11-12 02:21:56,865 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-74.i [2023-11-12 02:21:56,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:56,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:56,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:56,968 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@39072ef6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:56,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:21:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 137 states have internal predecessors, (207), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-12 02:21:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-12 02:21:57,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:57,049 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:57,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:57,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash -942340964, now seen corresponding path program 1 times [2023-11-12 02:21:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:57,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446840205] [2023-11-12 02:21:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:57,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:57,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446840205] [2023-11-12 02:21:57,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:21:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522091896] [2023-11-12 02:21:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:57,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:57,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:57,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:57,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:21:57,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-12 02:21:58,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522091896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:58,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:58,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844803463] [2023-11-12 02:21:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:58,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:21:58,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:21:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:58,101 INFO L87 Difference]: Start difference. First operand has 184 states, 136 states have (on average 1.5220588235294117) internal successors, (207), 137 states have internal predecessors, (207), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-12 02:21:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:58,160 INFO L93 Difference]: Finished difference Result 361 states and 633 transitions. [2023-11-12 02:21:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:21:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 310 [2023-11-12 02:21:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:58,175 INFO L225 Difference]: With dead ends: 361 [2023-11-12 02:21:58,175 INFO L226 Difference]: Without dead ends: 180 [2023-11-12 02:21:58,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:58,185 INFO L413 NwaCegarLoop]: 290 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, 290 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:58,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-12 02:21:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-12 02:21:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.5037593984962405) internal successors, (200), 133 states have internal predecessors, (200), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-12 02:21:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 290 transitions. [2023-11-12 02:21:58,299 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 290 transitions. Word has length 310 [2023-11-12 02:21:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:58,302 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 290 transitions. [2023-11-12 02:21:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-12 02:21:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 290 transitions. [2023-11-12 02:21:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-12 02:21:58,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:58,321 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:58,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:21:58,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:21:58,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:58,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash 725690262, now seen corresponding path program 1 times [2023-11-12 02:21:58,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:58,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692784388] [2023-11-12 02:21:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:58,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:58,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864679989] [2023-11-12 02:21:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:58,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:58,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:58,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:59,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:59,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:21:59,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692784388] [2023-11-12 02:21:59,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864679989] [2023-11-12 02:21:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864679989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:59,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:59,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:59,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223717148] [2023-11-12 02:21:59,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:59,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:59,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:59,203 INFO L87 Difference]: Start difference. First operand 180 states and 290 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:21:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:59,453 INFO L93 Difference]: Finished difference Result 472 states and 761 transitions. [2023-11-12 02:21:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:59,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 310 [2023-11-12 02:21:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:59,469 INFO L225 Difference]: With dead ends: 472 [2023-11-12 02:21:59,470 INFO L226 Difference]: Without dead ends: 295 [2023-11-12 02:21:59,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:59,474 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 178 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:59,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 866 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:21:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-12 02:21:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2023-11-12 02:21:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 235 states have (on average 1.5404255319148936) internal successors, (362), 236 states have internal predecessors, (362), 54 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-12 02:21:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 470 transitions. [2023-11-12 02:21:59,531 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 470 transitions. Word has length 310 [2023-11-12 02:21:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:59,533 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 470 transitions. [2023-11-12 02:21:59,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:21:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 470 transitions. [2023-11-12 02:21:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-12 02:21:59,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:59,540 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:59,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:59,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:21:59,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:59,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1213471784, now seen corresponding path program 1 times [2023-11-12 02:21:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124358348] [2023-11-12 02:21:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:59,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:59,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213557522] [2023-11-12 02:21:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:59,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:59,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:59,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:59,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:00,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:22:00,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:00,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:00,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124358348] [2023-11-12 02:22:00,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213557522] [2023-11-12 02:22:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213557522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:00,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:00,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631621925] [2023-11-12 02:22:00,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:00,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:00,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:00,323 INFO L87 Difference]: Start difference. First operand 292 states and 470 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:00,449 INFO L93 Difference]: Finished difference Result 862 states and 1388 transitions. [2023-11-12 02:22:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 310 [2023-11-12 02:22:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:00,459 INFO L225 Difference]: With dead ends: 862 [2023-11-12 02:22:00,459 INFO L226 Difference]: Without dead ends: 573 [2023-11-12 02:22:00,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:00,465 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 273 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:00,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 764 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-11-12 02:22:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2023-11-12 02:22:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 458 states have (on average 1.519650655021834) internal successors, (696), 460 states have internal predecessors, (696), 108 states have call successors, (108), 4 states have call predecessors, (108), 4 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-12 02:22:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 912 transitions. [2023-11-12 02:22:00,564 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 912 transitions. Word has length 310 [2023-11-12 02:22:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:00,569 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 912 transitions. [2023-11-12 02:22:00,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 912 transitions. [2023-11-12 02:22:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-12 02:22:00,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:00,573 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:00,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:00,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:00,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:00,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash -994617066, now seen corresponding path program 1 times [2023-11-12 02:22:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:00,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375746662] [2023-11-12 02:22:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:00,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:00,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503572109] [2023-11-12 02:22:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:00,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:00,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:00,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:01,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:22:01,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:01,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375746662] [2023-11-12 02:22:01,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503572109] [2023-11-12 02:22:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503572109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:01,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370668921] [2023-11-12 02:22:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:01,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:01,928 INFO L87 Difference]: Start difference. First operand 571 states and 912 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:02,646 INFO L93 Difference]: Finished difference Result 2285 states and 3643 transitions. [2023-11-12 02:22:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 310 [2023-11-12 02:22:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:02,662 INFO L225 Difference]: With dead ends: 2285 [2023-11-12 02:22:02,662 INFO L226 Difference]: Without dead ends: 1717 [2023-11-12 02:22:02,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:02,666 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 432 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:02,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1187 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:22:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2023-11-12 02:22:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1677. [2023-11-12 02:22:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1340 states have (on average 1.492537313432836) internal successors, (2000), 1346 states have internal predecessors, (2000), 324 states have call successors, (324), 12 states have call predecessors, (324), 12 states have return successors, (324), 318 states have call predecessors, (324), 324 states have call successors, (324) [2023-11-12 02:22:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2648 transitions. [2023-11-12 02:22:02,823 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2648 transitions. Word has length 310 [2023-11-12 02:22:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:02,824 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2648 transitions. [2023-11-12 02:22:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2648 transitions. [2023-11-12 02:22:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-11-12 02:22:02,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:02,830 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:02,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:03,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:03,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash 571291707, now seen corresponding path program 1 times [2023-11-12 02:22:03,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:03,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278493821] [2023-11-12 02:22:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:03,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:03,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:03,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410732027] [2023-11-12 02:22:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:03,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:03,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:22:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:03,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:22:03,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:03,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278493821] [2023-11-12 02:22:03,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410732027] [2023-11-12 02:22:03,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410732027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:03,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:03,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:22:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310900114] [2023-11-12 02:22:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:03,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:03,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:03,511 INFO L87 Difference]: Start difference. First operand 1677 states and 2648 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:03,993 INFO L93 Difference]: Finished difference Result 6657 states and 10398 transitions. [2023-11-12 02:22:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:03,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 311 [2023-11-12 02:22:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:04,032 INFO L225 Difference]: With dead ends: 6657 [2023-11-12 02:22:04,032 INFO L226 Difference]: Without dead ends: 4983 [2023-11-12 02:22:04,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:04,040 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 551 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:04,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1745 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:22:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2023-11-12 02:22:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 3302. [2023-11-12 02:22:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 2572 states have (on average 1.431570762052877) internal successors, (3682), 2596 states have internal predecessors, (3682), 696 states have call successors, (696), 33 states have call predecessors, (696), 33 states have return successors, (696), 672 states have call predecessors, (696), 696 states have call successors, (696) [2023-11-12 02:22:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 5074 transitions. [2023-11-12 02:22:04,536 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 5074 transitions. Word has length 311 [2023-11-12 02:22:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:04,537 INFO L495 AbstractCegarLoop]: Abstraction has 3302 states and 5074 transitions. [2023-11-12 02:22:04,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 5074 transitions. [2023-11-12 02:22:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-11-12 02:22:04,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:04,545 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:04,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:04,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:04,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:04,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1138437669, now seen corresponding path program 1 times [2023-11-12 02:22:04,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:04,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807498017] [2023-11-12 02:22:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:04,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:04,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793699626] [2023-11-12 02:22:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:04,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:04,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:04,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:05,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:22:05,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1968 proven. 54 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2023-11-12 02:22:05,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 78 proven. 54 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-12 02:22:05,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:05,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807498017] [2023-11-12 02:22:05,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:05,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793699626] [2023-11-12 02:22:05,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793699626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:05,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-12 02:22:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668036649] [2023-11-12 02:22:05,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:05,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:05,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:05,817 INFO L87 Difference]: Start difference. First operand 3302 states and 5074 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-12 02:22:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:07,506 INFO L93 Difference]: Finished difference Result 9077 states and 13896 transitions. [2023-11-12 02:22:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:22:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 311 [2023-11-12 02:22:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:07,548 INFO L225 Difference]: With dead ends: 9077 [2023-11-12 02:22:07,549 INFO L226 Difference]: Without dead ends: 5778 [2023-11-12 02:22:07,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 611 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:22:07,562 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 489 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:07,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1538 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:22:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2023-11-12 02:22:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 3830. [2023-11-12 02:22:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 2971 states have (on average 1.4153483675530125) internal successors, (4205), 3000 states have internal predecessors, (4205), 811 states have call successors, (811), 47 states have call predecessors, (811), 47 states have return successors, (811), 782 states have call predecessors, (811), 811 states have call successors, (811) [2023-11-12 02:22:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5827 transitions. [2023-11-12 02:22:08,193 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5827 transitions. Word has length 311 [2023-11-12 02:22:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:08,194 INFO L495 AbstractCegarLoop]: Abstraction has 3830 states and 5827 transitions. [2023-11-12 02:22:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-12 02:22:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5827 transitions. [2023-11-12 02:22:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-11-12 02:22:08,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:08,203 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:08,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:08,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:08,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:08,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1064591182, now seen corresponding path program 1 times [2023-11-12 02:22:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:08,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583595808] [2023-11-12 02:22:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:08,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:08,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904661223] [2023-11-12 02:22:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:08,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:08,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:08,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:08,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:22:08,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:09,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:09,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583595808] [2023-11-12 02:22:09,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904661223] [2023-11-12 02:22:09,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904661223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:09,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:09,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767951739] [2023-11-12 02:22:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:09,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:09,253 INFO L87 Difference]: Start difference. First operand 3830 states and 5827 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:09,902 INFO L93 Difference]: Finished difference Result 11531 states and 17490 transitions. [2023-11-12 02:22:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 312 [2023-11-12 02:22:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:09,954 INFO L225 Difference]: With dead ends: 11531 [2023-11-12 02:22:09,954 INFO L226 Difference]: Without dead ends: 7748 [2023-11-12 02:22:09,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:09,969 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 420 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:09,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 945 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:22:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2023-11-12 02:22:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 4584. [2023-11-12 02:22:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4584 states, 3471 states have (on average 1.3923941227312013) internal successors, (4833), 3502 states have internal predecessors, (4833), 1046 states have call successors, (1046), 66 states have call predecessors, (1046), 66 states have return successors, (1046), 1015 states have call predecessors, (1046), 1046 states have call successors, (1046) [2023-11-12 02:22:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4584 states to 4584 states and 6925 transitions. [2023-11-12 02:22:10,528 INFO L78 Accepts]: Start accepts. Automaton has 4584 states and 6925 transitions. Word has length 312 [2023-11-12 02:22:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:10,530 INFO L495 AbstractCegarLoop]: Abstraction has 4584 states and 6925 transitions. [2023-11-12 02:22:10,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4584 states and 6925 transitions. [2023-11-12 02:22:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-12 02:22:10,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:10,538 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:10,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:10,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:10,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:10,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2051010411, now seen corresponding path program 1 times [2023-11-12 02:22:10,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158225875] [2023-11-12 02:22:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:10,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:10,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482820505] [2023-11-12 02:22:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:10,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:10,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:10,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:22:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:11,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:22:11,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:12,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:12,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158225875] [2023-11-12 02:22:12,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482820505] [2023-11-12 02:22:12,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482820505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:12,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459120337] [2023-11-12 02:22:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:12,228 INFO L87 Difference]: Start difference. First operand 4584 states and 6925 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:13,356 INFO L93 Difference]: Finished difference Result 12344 states and 18750 transitions. [2023-11-12 02:22:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-12 02:22:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:13,401 INFO L225 Difference]: With dead ends: 12344 [2023-11-12 02:22:13,401 INFO L226 Difference]: Without dead ends: 7807 [2023-11-12 02:22:13,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:13,418 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 732 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:13,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 1331 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:22:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2023-11-12 02:22:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6607. [2023-11-12 02:22:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6607 states, 5038 states have (on average 1.3973799126637554) internal successors, (7040), 5081 states have internal predecessors, (7040), 1475 states have call successors, (1475), 93 states have call predecessors, (1475), 93 states have return successors, (1475), 1432 states have call predecessors, (1475), 1475 states have call successors, (1475) [2023-11-12 02:22:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 9990 transitions. [2023-11-12 02:22:14,234 INFO L78 Accepts]: Start accepts. Automaton has 6607 states and 9990 transitions. Word has length 313 [2023-11-12 02:22:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:14,235 INFO L495 AbstractCegarLoop]: Abstraction has 6607 states and 9990 transitions. [2023-11-12 02:22:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6607 states and 9990 transitions. [2023-11-12 02:22:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-12 02:22:14,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:14,244 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:14,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:14,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:22:14,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:14,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2109943379, now seen corresponding path program 1 times [2023-11-12 02:22:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:14,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050185821] [2023-11-12 02:22:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:14,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:14,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270458492] [2023-11-12 02:22:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:14,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:14,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:14,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:14,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:22:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:14,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:22:14,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:15,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:15,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050185821] [2023-11-12 02:22:15,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:15,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270458492] [2023-11-12 02:22:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270458492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:15,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:22:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618345075] [2023-11-12 02:22:15,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:15,292 INFO L87 Difference]: Start difference. First operand 6607 states and 9990 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:16,841 INFO L93 Difference]: Finished difference Result 16616 states and 25235 transitions. [2023-11-12 02:22:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:22:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-12 02:22:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:16,877 INFO L225 Difference]: With dead ends: 16616 [2023-11-12 02:22:16,877 INFO L226 Difference]: Without dead ends: 10056 [2023-11-12 02:22:16,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:22:16,900 INFO L413 NwaCegarLoop]: 924 mSDtfsCounter, 1507 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:16,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 3454 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:22:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2023-11-12 02:22:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 6932. [2023-11-12 02:22:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6932 states, 5350 states have (on average 1.3874766355140187) internal successors, (7423), 5395 states have internal predecessors, (7423), 1491 states have call successors, (1491), 90 states have call predecessors, (1491), 90 states have return successors, (1491), 1446 states have call predecessors, (1491), 1491 states have call successors, (1491) [2023-11-12 02:22:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6932 states to 6932 states and 10405 transitions. [2023-11-12 02:22:17,739 INFO L78 Accepts]: Start accepts. Automaton has 6932 states and 10405 transitions. Word has length 313 [2023-11-12 02:22:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:17,740 INFO L495 AbstractCegarLoop]: Abstraction has 6932 states and 10405 transitions. [2023-11-12 02:22:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6932 states and 10405 transitions. [2023-11-12 02:22:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-12 02:22:17,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:17,751 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:17,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:17,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:22:17,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:17,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:17,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1287630639, now seen corresponding path program 1 times [2023-11-12 02:22:17,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516323383] [2023-11-12 02:22:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:17,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:18,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:18,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572994607] [2023-11-12 02:22:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:18,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:18,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:18,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:22:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:18,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:22:18,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:18,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516323383] [2023-11-12 02:22:18,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:18,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572994607] [2023-11-12 02:22:18,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572994607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:18,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:18,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:22:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091432092] [2023-11-12 02:22:18,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:18,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:18,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:18,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:18,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:18,847 INFO L87 Difference]: Start difference. First operand 6932 states and 10405 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:20,632 INFO L93 Difference]: Finished difference Result 18029 states and 27058 transitions. [2023-11-12 02:22:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:22:20,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-12 02:22:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:20,673 INFO L225 Difference]: With dead ends: 18029 [2023-11-12 02:22:20,673 INFO L226 Difference]: Without dead ends: 13386 [2023-11-12 02:22:20,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:22:20,691 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 1981 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:20,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1981 Valid, 2274 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:22:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13386 states. [2023-11-12 02:22:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13386 to 8268. [2023-11-12 02:22:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8268 states, 6382 states have (on average 1.3857724851143842) internal successors, (8844), 6435 states have internal predecessors, (8844), 1777 states have call successors, (1777), 108 states have call predecessors, (1777), 108 states have return successors, (1777), 1724 states have call predecessors, (1777), 1777 states have call successors, (1777) [2023-11-12 02:22:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 12398 transitions. [2023-11-12 02:22:21,618 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 12398 transitions. Word has length 313 [2023-11-12 02:22:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:21,619 INFO L495 AbstractCegarLoop]: Abstraction has 8268 states and 12398 transitions. [2023-11-12 02:22:21,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 12398 transitions. [2023-11-12 02:22:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-12 02:22:21,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:21,628 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:21,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:21,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:22:21,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:21,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1786667407, now seen corresponding path program 1 times [2023-11-12 02:22:21,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:21,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991873512] [2023-11-12 02:22:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:21,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:21,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991764774] [2023-11-12 02:22:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:21,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:21,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:21,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:22:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:22,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:22:22,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:22,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:22,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:22,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991873512] [2023-11-12 02:22:22,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:22,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991764774] [2023-11-12 02:22:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991764774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486012452] [2023-11-12 02:22:22,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:22,734 INFO L87 Difference]: Start difference. First operand 8268 states and 12398 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:23,858 INFO L93 Difference]: Finished difference Result 15171 states and 22736 transitions. [2023-11-12 02:22:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-12 02:22:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:23,884 INFO L225 Difference]: With dead ends: 15171 [2023-11-12 02:22:23,884 INFO L226 Difference]: Without dead ends: 8286 [2023-11-12 02:22:23,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:23,903 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 407 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:23,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1246 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:22:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2023-11-12 02:22:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 8246. [2023-11-12 02:22:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8246 states, 6360 states have (on average 1.3849056603773584) internal successors, (8808), 6413 states have internal predecessors, (8808), 1777 states have call successors, (1777), 108 states have call predecessors, (1777), 108 states have return successors, (1777), 1724 states have call predecessors, (1777), 1777 states have call successors, (1777) [2023-11-12 02:22:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8246 states to 8246 states and 12362 transitions. [2023-11-12 02:22:24,766 INFO L78 Accepts]: Start accepts. Automaton has 8246 states and 12362 transitions. Word has length 313 [2023-11-12 02:22:24,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:24,767 INFO L495 AbstractCegarLoop]: Abstraction has 8246 states and 12362 transitions. [2023-11-12 02:22:24,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8246 states and 12362 transitions. [2023-11-12 02:22:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-11-12 02:22:24,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:24,776 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:24,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:24,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:24,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:24,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash 529255721, now seen corresponding path program 1 times [2023-11-12 02:22:24,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:24,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765797153] [2023-11-12 02:22:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:25,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:25,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974887876] [2023-11-12 02:22:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:25,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:25,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:25,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:22:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:25,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:22:25,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:25,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:25,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765797153] [2023-11-12 02:22:25,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974887876] [2023-11-12 02:22:25,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974887876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:25,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:25,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:25,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661867472] [2023-11-12 02:22:25,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:25,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:22:25,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:22:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:22:25,994 INFO L87 Difference]: Start difference. First operand 8246 states and 12362 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:29,067 INFO L93 Difference]: Finished difference Result 23384 states and 34809 transitions. [2023-11-12 02:22:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:22:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 313 [2023-11-12 02:22:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:29,120 INFO L225 Difference]: With dead ends: 23384 [2023-11-12 02:22:29,121 INFO L226 Difference]: Without dead ends: 16407 [2023-11-12 02:22:29,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:22:29,137 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 1207 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:29,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 2541 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 02:22:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16407 states. [2023-11-12 02:22:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16407 to 7053. [2023-11-12 02:22:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5460 states have (on average 1.3844322344322344) internal successors, (7559), 5506 states have internal predecessors, (7559), 1500 states have call successors, (1500), 92 states have call predecessors, (1500), 92 states have return successors, (1500), 1454 states have call predecessors, (1500), 1500 states have call successors, (1500) [2023-11-12 02:22:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 10559 transitions. [2023-11-12 02:22:29,972 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 10559 transitions. Word has length 313 [2023-11-12 02:22:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:29,973 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 10559 transitions. [2023-11-12 02:22:29,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 10559 transitions. [2023-11-12 02:22:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-12 02:22:29,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:29,980 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:29,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:30,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:30,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1169968195, now seen corresponding path program 1 times [2023-11-12 02:22:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:30,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667345010] [2023-11-12 02:22:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:30,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:30,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659118397] [2023-11-12 02:22:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:30,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:30,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:22:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:30,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:22:30,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:30,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:30,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667345010] [2023-11-12 02:22:30,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659118397] [2023-11-12 02:22:30,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659118397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:30,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:30,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823224274] [2023-11-12 02:22:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:30,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:30,664 INFO L87 Difference]: Start difference. First operand 7053 states and 10559 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:31,139 INFO L93 Difference]: Finished difference Result 11611 states and 17424 transitions. [2023-11-12 02:22:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 314 [2023-11-12 02:22:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:31,156 INFO L225 Difference]: With dead ends: 11611 [2023-11-12 02:22:31,156 INFO L226 Difference]: Without dead ends: 4561 [2023-11-12 02:22:31,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:31,169 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 275 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:31,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 277 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2023-11-12 02:22:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 2247. [2023-11-12 02:22:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 1754 states have (on average 1.3893956670467502) internal successors, (2437), 1768 states have internal predecessors, (2437), 464 states have call successors, (464), 28 states have call predecessors, (464), 28 states have return successors, (464), 450 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-12 02:22:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3365 transitions. [2023-11-12 02:22:31,510 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3365 transitions. Word has length 314 [2023-11-12 02:22:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:31,510 INFO L495 AbstractCegarLoop]: Abstraction has 2247 states and 3365 transitions. [2023-11-12 02:22:31,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3365 transitions. [2023-11-12 02:22:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-12 02:22:31,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:31,515 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:31,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:31,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:31,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:31,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash -587645031, now seen corresponding path program 1 times [2023-11-12 02:22:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:31,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435552089] [2023-11-12 02:22:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:31,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:31,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320631204] [2023-11-12 02:22:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:31,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:31,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:31,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:22:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:32,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:22:32,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-12 02:22:33,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:33,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435552089] [2023-11-12 02:22:33,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:33,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320631204] [2023-11-12 02:22:33,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320631204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:33,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:33,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22444125] [2023-11-12 02:22:33,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:33,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:33,409 INFO L87 Difference]: Start difference. First operand 2247 states and 3365 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 8 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:36,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:36,847 INFO L93 Difference]: Finished difference Result 10652 states and 15824 transitions. [2023-11-12 02:22:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:22:36,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 8 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 315 [2023-11-12 02:22:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:36,878 INFO L225 Difference]: With dead ends: 10652 [2023-11-12 02:22:36,879 INFO L226 Difference]: Without dead ends: 8408 [2023-11-12 02:22:36,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:22:36,886 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 2418 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2418 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:36,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2418 Valid, 2600 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 02:22:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8408 states. [2023-11-12 02:22:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8408 to 5044. [2023-11-12 02:22:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5044 states, 3978 states have (on average 1.3826043237807943) internal successors, (5500), 4014 states have internal predecessors, (5500), 1002 states have call successors, (1002), 63 states have call predecessors, (1002), 63 states have return successors, (1002), 966 states have call predecessors, (1002), 1002 states have call successors, (1002) [2023-11-12 02:22:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5044 states to 5044 states and 7504 transitions. [2023-11-12 02:22:37,619 INFO L78 Accepts]: Start accepts. Automaton has 5044 states and 7504 transitions. Word has length 315 [2023-11-12 02:22:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:37,620 INFO L495 AbstractCegarLoop]: Abstraction has 5044 states and 7504 transitions. [2023-11-12 02:22:37,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 8 states have internal predecessors, (93), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-12 02:22:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5044 states and 7504 transitions. [2023-11-12 02:22:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-12 02:22:37,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:37,629 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:37,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64ad62a-f275-4619-8227-6629c8d46c67/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0