./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array12_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array12_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:22,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:22,666 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:25:22,674 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:22,675 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:22,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:22,704 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:22,705 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:22,706 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:22,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:22,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:22,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:22,709 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:22,710 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:22,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:25:22,711 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:22,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:22,712 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:22,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:22,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:25:22,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:22,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:25:22,715 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:22,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:25:22,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:22,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:22,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:22,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:22,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:22,719 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:22,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:22,720 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:25:22,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:22,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:22,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:22,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:25:22,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:22,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:22,723 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:22,724 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_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2023-11-06 22:25:23,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:23,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:23,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:23,135 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:23,136 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:23,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-patterns/array12_pattern.c [2023-11-06 22:25:26,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:27,064 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:27,065 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/sv-benchmarks/c/array-patterns/array12_pattern.c [2023-11-06 22:25:27,074 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/data/b0d9e7913/551ae5916da944d2a411519a91f7b185/FLAGfe34bb2f5 [2023-11-06 22:25:27,088 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/data/b0d9e7913/551ae5916da944d2a411519a91f7b185 [2023-11-06 22:25:27,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:27,093 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:27,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:27,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:27,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:27,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653bdfe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27, skipping insertion in model container [2023-11-06 22:25:27,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,145 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:27,321 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_3f62a5c9-3b7a-4929-8f75-0d70527057ca/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2023-11-06 22:25:27,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:27,356 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:27,372 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_3f62a5c9-3b7a-4929-8f75-0d70527057ca/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2023-11-06 22:25:27,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:27,403 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:27,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27 WrapperNode [2023-11-06 22:25:27,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:27,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:27,405 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:27,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:27,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,449 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2023-11-06 22:25:27,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:27,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:27,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:27,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:27,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,481 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:27,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:27,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:27,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:27,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (1/1) ... [2023-11-06 22:25:27,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:27,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:27,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:27,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:27,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:25:27,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:25:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:25:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:25:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:25:27,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:27,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:25:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:25:27,656 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:27,659 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:27,870 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:27,878 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:27,878 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 22:25:27,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:27 BoogieIcfgContainer [2023-11-06 22:25:27,881 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:27,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:27,885 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:27,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:27,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:27" (1/3) ... [2023-11-06 22:25:27,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdf9e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:27, skipping insertion in model container [2023-11-06 22:25:27,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:27" (2/3) ... [2023-11-06 22:25:27,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdf9e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:27, skipping insertion in model container [2023-11-06 22:25:27,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:27" (3/3) ... [2023-11-06 22:25:27,897 INFO L112 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2023-11-06 22:25:27,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:27,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:25:27,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:27,999 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d2a3248, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:27,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:25:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:25:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:25:28,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:28,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:28,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:28,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2136223091, now seen corresponding path program 1 times [2023-11-06 22:25:28,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:28,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148760920] [2023-11-06 22:25:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:28,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148760920] [2023-11-06 22:25:28,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:25:28,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690961761] [2023-11-06 22:25:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:28,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:28,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:28,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:25:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:28,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:25:28,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:28,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690961761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:28,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:28,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769695617] [2023-11-06 22:25:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:28,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:25:28,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:28,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:25:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:25:28,590 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:25:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:28,619 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2023-11-06 22:25:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:25:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-06 22:25:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:28,631 INFO L225 Difference]: With dead ends: 57 [2023-11-06 22:25:28,631 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 22:25:28,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:25:28,639 INFO L413 NwaCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:28,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:25:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 22:25:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 22:25:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:25:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-06 22:25:28,686 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2023-11-06 22:25:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:28,687 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-06 22:25:28,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:25:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-06 22:25:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:25:28,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:28,691 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:28,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:25:28,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:25:28,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:28,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1040942554, now seen corresponding path program 1 times [2023-11-06 22:25:28,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:28,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643001350] [2023-11-06 22:25:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:28,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:28,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:25:28,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860477788] [2023-11-06 22:25:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:28,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:28,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:25:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:29,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:25:29,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:25:29,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643001350] [2023-11-06 22:25:29,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860477788] [2023-11-06 22:25:29,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860477788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:29,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:29,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:25:29,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005374948] [2023-11-06 22:25:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:29,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:25:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:25:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:25:29,281 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:25:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:29,499 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-11-06 22:25:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:25:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-06 22:25:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:29,504 INFO L225 Difference]: With dead ends: 56 [2023-11-06 22:25:29,504 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:25:29,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:25:29,508 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:29,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:25:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:25:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-11-06 22:25:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:25:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-06 22:25:29,536 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 27 [2023-11-06 22:25:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:29,537 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-06 22:25:29,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:25:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-06 22:25:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 22:25:29,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:29,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:29,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:25:29,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:29,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:29,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash -66078307, now seen corresponding path program 1 times [2023-11-06 22:25:29,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:29,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178653866] [2023-11-06 22:25:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:29,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:29,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:25:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207312299] [2023-11-06 22:25:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:29,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:29,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:29,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:29,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:25:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:29,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:25:29,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:25:29,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:25:29,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:29,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178653866] [2023-11-06 22:25:29,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:29,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207312299] [2023-11-06 22:25:29,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207312299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:29,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:29,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:25:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536932995] [2023-11-06 22:25:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:25:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:25:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:25:29,964 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:25:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:30,065 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-11-06 22:25:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:25:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-11-06 22:25:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:30,069 INFO L225 Difference]: With dead ends: 59 [2023-11-06 22:25:30,069 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:25:30,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:25:30,074 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:30,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:25:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:25:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-11-06 22:25:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:25:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-06 22:25:30,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2023-11-06 22:25:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:30,094 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-06 22:25:30,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:25:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-06 22:25:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:25:30,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:30,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:30,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:30,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:30,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1831364287, now seen corresponding path program 1 times [2023-11-06 22:25:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:30,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441828111] [2023-11-06 22:25:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:30,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:25:30,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431720837] [2023-11-06 22:25:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:30,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:30,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:30,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:25:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:30,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:25:30,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:31,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:25:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:25:31,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:31,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-06 22:25:31,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2023-11-06 22:25:31,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-06 22:25:31,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2023-11-06 22:25:32,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441828111] [2023-11-06 22:25:32,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431720837] [2023-11-06 22:25:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431720837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:25:32,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:25:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-06 22:25:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343747056] [2023-11-06 22:25:32,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:25:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:25:32,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:25:32,368 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:25:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:33,521 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-11-06 22:25:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:25:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2023-11-06 22:25:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:33,525 INFO L225 Difference]: With dead ends: 81 [2023-11-06 22:25:33,525 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 22:25:33,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:25:33,528 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:33,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 141 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:25:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 22:25:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2023-11-06 22:25:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:25:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-11-06 22:25:33,551 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 37 [2023-11-06 22:25:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:33,551 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-11-06 22:25:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:25:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-11-06 22:25:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:25:33,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:33,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:33,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:33,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:33,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:33,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1155769123, now seen corresponding path program 2 times [2023-11-06 22:25:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:33,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460414254] [2023-11-06 22:25:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:33,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:33,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:25:33,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035978862] [2023-11-06 22:25:33,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:25:33,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:33,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:33,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:33,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:25:33,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:25:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:33,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:25:33,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:25:34,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:25:34,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:34,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460414254] [2023-11-06 22:25:34,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:34,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035978862] [2023-11-06 22:25:34,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035978862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:34,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:25:34,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-06 22:25:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139942150] [2023-11-06 22:25:34,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:34,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:25:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:25:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:25:34,127 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:25:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:34,380 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2023-11-06 22:25:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:25:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-06 22:25:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:34,383 INFO L225 Difference]: With dead ends: 157 [2023-11-06 22:25:34,383 INFO L226 Difference]: Without dead ends: 112 [2023-11-06 22:25:34,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:25:34,385 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:34,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 95 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:25:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-06 22:25:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2023-11-06 22:25:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:25:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2023-11-06 22:25:34,429 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 39 [2023-11-06 22:25:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:34,430 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2023-11-06 22:25:34,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:25:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2023-11-06 22:25:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:25:34,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:34,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:34,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:25:34,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:34,651 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:34,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1584262531, now seen corresponding path program 3 times [2023-11-06 22:25:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:34,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515958151] [2023-11-06 22:25:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:34,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:34,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:25:34,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262349524] [2023-11-06 22:25:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:25:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:25:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:34,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:25:34,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:25:34,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:25:34,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:25:34,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:25:34,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:25:35,182 INFO L322 Elim1Store]: treesize reduction 30, result has 50.0 percent of original size [2023-11-06 22:25:35,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 47 [2023-11-06 22:25:42,044 WARN L293 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 319] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-06 22:25:42,044 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:25:42,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 145 [2023-11-06 22:25:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:25:58,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:25:58,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 22:25:58,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-11-06 22:25:58,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-11-06 22:25:58,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-11-06 22:25:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:25:58,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515958151] [2023-11-06 22:25:58,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:25:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262349524] [2023-11-06 22:25:58,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262349524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:25:58,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:25:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-11-06 22:25:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344598097] [2023-11-06 22:25:58,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:25:58,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:25:58,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:25:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:25:58,782 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:26:04,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:26:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:04,352 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2023-11-06 22:26:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:26:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2023-11-06 22:26:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:04,355 INFO L225 Difference]: With dead ends: 111 [2023-11-06 22:26:04,355 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 22:26:04,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:26:04,358 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:04,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 155 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-06 22:26:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 22:26:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 67. [2023-11-06 22:26:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:26:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2023-11-06 22:26:04,391 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 39 [2023-11-06 22:26:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:04,391 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2023-11-06 22:26:04,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 25 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:26:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2023-11-06 22:26:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 22:26:04,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:04,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:04,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:04,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:26:04,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:04,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2076840219, now seen corresponding path program 4 times [2023-11-06 22:26:04,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:04,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566856872] [2023-11-06 22:26:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:04,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:04,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102975949] [2023-11-06 22:26:04,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:26:04,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:04,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:04,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:26:04,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:26:04,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:04,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:04,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:26:04,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:26:04,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:04,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566856872] [2023-11-06 22:26:04,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:04,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102975949] [2023-11-06 22:26:04,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102975949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:04,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:04,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-06 22:26:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764216983] [2023-11-06 22:26:04,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:04,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:26:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:26:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:26:04,911 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:05,221 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2023-11-06 22:26:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:26:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-06 22:26:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:05,224 INFO L225 Difference]: With dead ends: 118 [2023-11-06 22:26:05,224 INFO L226 Difference]: Without dead ends: 114 [2023-11-06 22:26:05,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:26:05,226 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 46 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:05,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:26:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-06 22:26:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2023-11-06 22:26:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:26:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2023-11-06 22:26:05,264 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 41 [2023-11-06 22:26:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:05,265 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2023-11-06 22:26:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2023-11-06 22:26:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:26:05,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:05,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:05,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:05,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:26:05,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:05,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash -624697650, now seen corresponding path program 5 times [2023-11-06 22:26:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:05,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674628104] [2023-11-06 22:26:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:05,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:05,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378645987] [2023-11-06 22:26:05,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:26:05,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:05,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:05,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:26:05,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 22:26:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:05,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:05,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:26:05,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:26:05,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674628104] [2023-11-06 22:26:05,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378645987] [2023-11-06 22:26:05,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378645987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:05,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:05,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-06 22:26:05,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184673274] [2023-11-06 22:26:05,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:05,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:26:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:26:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:26:05,744 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:05,982 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2023-11-06 22:26:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:26:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-11-06 22:26:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:05,984 INFO L225 Difference]: With dead ends: 89 [2023-11-06 22:26:05,985 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 22:26:05,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:26:05,986 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:05,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 85 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 22:26:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2023-11-06 22:26:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:26:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-11-06 22:26:06,032 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 42 [2023-11-06 22:26:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:06,032 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-11-06 22:26:06,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-11-06 22:26:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:26:06,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:06,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:06,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:06,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:26:06,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:06,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1532894260, now seen corresponding path program 6 times [2023-11-06 22:26:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:06,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510717695] [2023-11-06 22:26:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:06,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:06,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896455925] [2023-11-06 22:26:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:26:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:06,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:06,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:26:06,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 22:26:06,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:06,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:06,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:26:06,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:26:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510717695] [2023-11-06 22:26:06,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896455925] [2023-11-06 22:26:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896455925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:06,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 22:26:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630171130] [2023-11-06 22:26:06,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:26:06,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:26:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:26:06,466 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:06,613 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2023-11-06 22:26:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:26:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-11-06 22:26:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:06,615 INFO L225 Difference]: With dead ends: 67 [2023-11-06 22:26:06,615 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:26:06,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:26:06,617 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:06,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 46 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:26:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-11-06 22:26:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:26:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-06 22:26:06,634 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 44 [2023-11-06 22:26:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:06,635 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-06 22:26:06,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-06 22:26:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 22:26:06,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:06,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:06,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:06,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:06,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash -69369012, now seen corresponding path program 7 times [2023-11-06 22:26:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:06,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946200197] [2023-11-06 22:26:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:06,857 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994118958] [2023-11-06 22:26:06,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:26:06,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:06,859 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:06,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:26:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:06,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:06,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-06 22:26:07,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:26:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946200197] [2023-11-06 22:26:07,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:07,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994118958] [2023-11-06 22:26:07,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994118958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:07,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:07,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-06 22:26:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403493094] [2023-11-06 22:26:07,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:26:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:26:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:26:07,076 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:07,293 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2023-11-06 22:26:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:26:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-11-06 22:26:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:07,295 INFO L225 Difference]: With dead ends: 93 [2023-11-06 22:26:07,295 INFO L226 Difference]: Without dead ends: 64 [2023-11-06 22:26:07,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:26:07,296 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:07,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 87 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-06 22:26:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2023-11-06 22:26:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:26:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2023-11-06 22:26:07,316 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 48 [2023-11-06 22:26:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:07,317 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2023-11-06 22:26:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2023-11-06 22:26:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 22:26:07,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:07,318 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:07,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:07,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:07,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1249277894, now seen corresponding path program 8 times [2023-11-06 22:26:07,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687061852] [2023-11-06 22:26:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:07,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:07,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044488488] [2023-11-06 22:26:07,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:07,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:07,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:07,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:26:07,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:07,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 22:26:07,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:08,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:26:08,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 22:26:08,501 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:08,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-06 22:26:08,662 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:08,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-06 22:26:09,837 INFO L322 Elim1Store]: treesize reduction 516, result has 21.1 percent of original size [2023-11-06 22:26:09,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 83 treesize of output 175 [2023-11-06 22:26:12,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:12,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 83 [2023-11-06 22:26:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:26:12,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:14,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687061852] [2023-11-06 22:26:14,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:14,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044488488] [2023-11-06 22:26:14,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044488488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:14,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:14,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-11-06 22:26:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165784901] [2023-11-06 22:26:14,984 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:14,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:26:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:26:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:26:14,988 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:26:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:17,596 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2023-11-06 22:26:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:26:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2023-11-06 22:26:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:17,598 INFO L225 Difference]: With dead ends: 113 [2023-11-06 22:26:17,598 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:26:17,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=334, Invalid=2858, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:26:17,601 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:17,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 194 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:26:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:26:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2023-11-06 22:26:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:26:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2023-11-06 22:26:17,641 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 55 [2023-11-06 22:26:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:17,642 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2023-11-06 22:26:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:26:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2023-11-06 22:26:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 22:26:17,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:17,644 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:17,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:17,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:17,850 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:17,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1328435676, now seen corresponding path program 9 times [2023-11-06 22:26:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:17,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350931621] [2023-11-06 22:26:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:17,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:17,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051854563] [2023-11-06 22:26:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:26:17,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:17,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:17,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:17,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:26:20,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 22:26:20,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:20,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:26:20,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:26:20,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:26:20,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:20,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350931621] [2023-11-06 22:26:20,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:20,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051854563] [2023-11-06 22:26:20,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051854563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:20,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-06 22:26:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680684927] [2023-11-06 22:26:20,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:26:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:26:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:26:20,811 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:21,136 INFO L93 Difference]: Finished difference Result 216 states and 255 transitions. [2023-11-06 22:26:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:26:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2023-11-06 22:26:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:21,140 INFO L225 Difference]: With dead ends: 216 [2023-11-06 22:26:21,141 INFO L226 Difference]: Without dead ends: 150 [2023-11-06 22:26:21,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:26:21,147 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:21,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 93 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:26:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-06 22:26:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2023-11-06 22:26:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:26:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2023-11-06 22:26:21,239 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 57 [2023-11-06 22:26:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:21,240 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2023-11-06 22:26:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2023-11-06 22:26:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 22:26:21,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:21,242 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:21,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:26:21,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:21,451 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:21,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1874529176, now seen corresponding path program 10 times [2023-11-06 22:26:21,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:21,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735840291] [2023-11-06 22:26:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:21,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:21,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:21,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243137351] [2023-11-06 22:26:21,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:26:21,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:21,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:21,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:21,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:26:21,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:26:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:21,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:26:21,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:26:21,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 22:26:21,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735840291] [2023-11-06 22:26:21,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243137351] [2023-11-06 22:26:21,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243137351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:21,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:21,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-06 22:26:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508150983] [2023-11-06 22:26:21,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:21,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:26:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:26:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:26:21,808 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:22,066 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2023-11-06 22:26:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:26:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-06 22:26:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:22,068 INFO L225 Difference]: With dead ends: 167 [2023-11-06 22:26:22,068 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 22:26:22,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:26:22,070 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:22,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 92 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:26:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 22:26:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2023-11-06 22:26:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.121212121212121) internal successors, (111), 99 states have internal predecessors, (111), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:26:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2023-11-06 22:26:22,131 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 57 [2023-11-06 22:26:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:22,131 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2023-11-06 22:26:22,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2023-11-06 22:26:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-06 22:26:22,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:22,133 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:22,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:22,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:22,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1705219253, now seen corresponding path program 11 times [2023-11-06 22:26:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:22,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031017892] [2023-11-06 22:26:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:22,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:22,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278266620] [2023-11-06 22:26:22,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:26:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:22,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:22,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:26:22,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-06 22:26:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:22,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:26:22,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 22:26:22,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 22:26:22,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031017892] [2023-11-06 22:26:22,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:22,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278266620] [2023-11-06 22:26:22,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278266620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:22,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:22,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-06 22:26:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323180909] [2023-11-06 22:26:22,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:26:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:22,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:26:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:26:22,673 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:22,977 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2023-11-06 22:26:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:26:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2023-11-06 22:26:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:22,980 INFO L225 Difference]: With dead ends: 178 [2023-11-06 22:26:22,980 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:26:22,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:26:22,986 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 120 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:22,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 73 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:26:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:26:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2023-11-06 22:26:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:26:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2023-11-06 22:26:23,038 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 62 [2023-11-06 22:26:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:23,038 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2023-11-06 22:26:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2023-11-06 22:26:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:26:23,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:23,040 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:23,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:23,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:23,241 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:23,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1763746438, now seen corresponding path program 12 times [2023-11-06 22:26:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:23,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262309228] [2023-11-06 22:26:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:23,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791835311] [2023-11-06 22:26:23,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:26:23,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:23,259 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:23,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:26:23,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-06 22:26:23,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:23,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:26:23,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 22:26:23,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 22:26:23,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:23,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262309228] [2023-11-06 22:26:23,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:26:23,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791835311] [2023-11-06 22:26:23,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791835311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:23,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:26:23,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:26:23,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798726701] [2023-11-06 22:26:23,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:23,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:26:23,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:26:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:26:23,726 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:24,115 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2023-11-06 22:26:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:26:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2023-11-06 22:26:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:24,117 INFO L225 Difference]: With dead ends: 170 [2023-11-06 22:26:24,117 INFO L226 Difference]: Without dead ends: 137 [2023-11-06 22:26:24,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:26:24,119 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:24,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 106 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:26:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-06 22:26:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 121. [2023-11-06 22:26:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 109 states have internal predecessors, (120), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:26:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2023-11-06 22:26:24,177 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 63 [2023-11-06 22:26:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:24,178 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2023-11-06 22:26:24,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:26:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2023-11-06 22:26:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:26:24,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:24,179 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:24,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:26:24,394 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:24,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1511383042, now seen corresponding path program 1 times [2023-11-06 22:26:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208443529] [2023-11-06 22:26:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:24,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:26:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453764709] [2023-11-06 22:26:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:24,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:24,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:24,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:24,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:26:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:25,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-06 22:26:25,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:25,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:26:25,718 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 22:26:26,005 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:26,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-06 22:26:26,166 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:26:26,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-06 22:26:27,427 INFO L322 Elim1Store]: treesize reduction 516, result has 21.1 percent of original size [2023-11-06 22:26:27,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 83 treesize of output 175 [2023-11-06 22:26:33,017 INFO L322 Elim1Store]: treesize reduction 1756, result has 20.8 percent of original size [2023-11-06 22:26:33,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 7 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 232 case distinctions, treesize of input 273 treesize of output 596 [2023-11-06 22:27:05,119 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:05,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 331 treesize of output 281 [2023-11-06 22:27:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:27:07,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208443529] [2023-11-06 22:27:10,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:27:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453764709] [2023-11-06 22:27:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453764709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:10,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:10,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2023-11-06 22:27:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123746558] [2023-11-06 22:27:10,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 22:27:10,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 22:27:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=3002, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:27:10,995 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 43 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 36 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:27:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:27:15,682 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2023-11-06 22:27:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:27:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 36 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 68 [2023-11-06 22:27:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:27:15,690 INFO L225 Difference]: With dead ends: 155 [2023-11-06 22:27:15,690 INFO L226 Difference]: Without dead ends: 135 [2023-11-06 22:27:15,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=639, Invalid=4911, Unknown=0, NotChecked=0, Total=5550 [2023-11-06 22:27:15,693 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:27:15,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 325 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 22:27:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-06 22:27:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2023-11-06 22:27:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:27:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2023-11-06 22:27:15,765 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 68 [2023-11-06 22:27:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:15,766 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2023-11-06 22:27:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 36 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:27:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2023-11-06 22:27:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-06 22:27:15,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:27:15,768 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:27:15,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:15,983 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:27:15,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1305767226, now seen corresponding path program 2 times [2023-11-06 22:27:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522748250] [2023-11-06 22:27:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:27:16,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:27:16,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681013709] [2023-11-06 22:27:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:27:16,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:16,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:16,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:16,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f62a5c9-3b7a-4929-8f75-0d70527057ca/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:27:18,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:27:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:27:18,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-06 22:27:18,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:19,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:27:19,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:27:19,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:19,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-06 22:27:19,627 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:27:19,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-06 22:27:35,683 INFO L322 Elim1Store]: treesize reduction 703, result has 27.2 percent of original size [2023-11-06 22:27:35,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 97 treesize of output 301 [2023-11-06 22:27:54,200 WARN L293 SmtUtils]: Spent 11.84s on a formula simplification. DAG size of input: 831 DAG size of output: 398 (called from [L 319] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-06 22:27:54,201 INFO L322 Elim1Store]: treesize reduction 2617, result has 38.1 percent of original size [2023-11-06 22:27:54,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 1 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 211 case distinctions, treesize of input 296 treesize of output 1736