./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp2.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_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/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_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/indp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/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_a0b9e78e-783e-4633-9e79-6ade57908c41/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 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:16:47,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:16:47,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:16:47,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:16:47,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:16:47,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:16:47,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:16:47,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:16:47,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:16:47,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:16:47,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:16:47,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:16:47,518 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:16:47,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:16:47,521 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:16:47,521 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:16:47,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:16:47,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:16:47,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:16:47,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:16:47,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:16:47,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:16:47,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:16:47,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:16:47,526 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:16:47,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:16:47,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:16:47,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:16:47,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:47,530 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:16:47,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:16:47,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:16:47,532 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:16:47,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:16:47,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:16:47,533 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:16:47,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:16:47,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:16:47,534 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:16:47,534 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_a0b9e78e-783e-4633-9e79-6ade57908c41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 [2023-11-06 22:16:47,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:16:47,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:16:47,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:16:47,927 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:16:47,927 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:16:47,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-fpi/indp2.c [2023-11-06 22:16:51,360 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:16:51,674 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:16:51,675 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/sv-benchmarks/c/array-fpi/indp2.c [2023-11-06 22:16:51,685 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/data/d2cfdb57c/d18ecc225df04e68ace5ed0a7556088c/FLAGbc7ce57f0 [2023-11-06 22:16:51,705 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/data/d2cfdb57c/d18ecc225df04e68ace5ed0a7556088c [2023-11-06 22:16:51,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:16:51,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:16:51,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:51,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:16:51,730 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:16:51,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:51" (1/1) ... [2023-11-06 22:16:51,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cab0f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:51, skipping insertion in model container [2023-11-06 22:16:51,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:51" (1/1) ... [2023-11-06 22:16:51,763 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:16:51,949 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_a0b9e78e-783e-4633-9e79-6ade57908c41/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2023-11-06 22:16:51,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:51,984 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:16:52,007 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_a0b9e78e-783e-4633-9e79-6ade57908c41/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2023-11-06 22:16:52,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:52,047 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:16:52,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52 WrapperNode [2023-11-06 22:16:52,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:52,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:52,052 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:16:52,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:16:52,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,109 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-11-06 22:16:52,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:52,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:16:52,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:16:52,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:16:52,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,126 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,132 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,139 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,143 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:16:52,144 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:16:52,144 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:16:52,144 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:16:52,145 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (1/1) ... [2023-11-06 22:16:52,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:52,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:16:52,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:16:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:16:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:16:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:16:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:16:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:16:52,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:16:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:16:52,364 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:16:52,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:16:52,570 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:16:52,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:16:52,578 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:16:52,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:52 BoogieIcfgContainer [2023-11-06 22:16:52,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:16:52,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:16:52,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:16:52,588 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:16:52,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:51" (1/3) ... [2023-11-06 22:16:52,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cfb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:52, skipping insertion in model container [2023-11-06 22:16:52,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:52" (2/3) ... [2023-11-06 22:16:52,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cfb2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:52, skipping insertion in model container [2023-11-06 22:16:52,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:52" (3/3) ... [2023-11-06 22:16:52,592 INFO L112 eAbstractionObserver]: Analyzing ICFG indp2.c [2023-11-06 22:16:52,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:16:52,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:16:52,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:52,693 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;@3b467d4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:52,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:16:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:16:52,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:52,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:52,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:52,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2023-11-06 22:16:52,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:52,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204421549] [2023-11-06 22:16:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:52,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:53,015 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 22:16:53,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:53,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204421549] [2023-11-06 22:16:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204421549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:53,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:53,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:16:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560085766] [2023-11-06 22:16:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:53,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:16:53,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:53,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:16:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:53,065 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:53,085 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2023-11-06 22:16:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:16:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 22:16:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:53,096 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:16:53,096 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 22:16:53,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 22:16:53,104 INFO L413 NwaCegarLoop]: 28 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, 28 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 22:16:53,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 22:16:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 22:16:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-06 22:16:53,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-11-06 22:16:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:53,163 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-06 22:16:53,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-06 22:16:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:16:53,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:53,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:53,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:16:53,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:53,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2023-11-06 22:16:53,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:53,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216112280] [2023-11-06 22:16:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:53,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:53,369 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 22:16:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:53,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216112280] [2023-11-06 22:16:53,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216112280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:53,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:53,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315093307] [2023-11-06 22:16:53,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:53,375 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:53,500 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-06 22:16:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:16:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 22:16:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:53,502 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:16:53,502 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 22:16:53,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:53,505 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:53,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:16:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 22:16:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-11-06 22:16:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-06 22:16:53,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-11-06 22:16:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:53,515 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-06 22:16:53,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-06 22:16:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:16:53,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:53,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:53,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:16:53,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:53,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2023-11-06 22:16:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:53,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315513924] [2023-11-06 22:16:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:53,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:53,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:53,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104144278] [2023-11-06 22:16:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:53,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:53,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:53,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:53,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:16:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:53,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:16:53,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:53,899 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 9 [2023-11-06 22:16:53,974 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 15 [2023-11-06 22:16:54,032 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 13 [2023-11-06 22:16:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:54,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:54,392 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 20 treesize of output 18 [2023-11-06 22:16:54,400 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 22 treesize of output 20 [2023-11-06 22:16:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:54,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315513924] [2023-11-06 22:16:54,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:54,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104144278] [2023-11-06 22:16:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104144278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:54,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:54,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-11-06 22:16:54,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114665161] [2023-11-06 22:16:54,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:54,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:16:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:16:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:16:54,448 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:54,873 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-06 22:16:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:16:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 22:16:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:54,876 INFO L225 Difference]: With dead ends: 55 [2023-11-06 22:16:54,876 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:16:54,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:16:54,879 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:54,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 110 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:16:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:16:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2023-11-06 22:16:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-06 22:16:54,895 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2023-11-06 22:16:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:54,895 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-06 22:16:54,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-06 22:16:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:16:54,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:54,899 INFO L195 NwaCegarLoop]: trace histogram [2, 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 22:16:54,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:55,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:55,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:55,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2023-11-06 22:16:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:55,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094939932] [2023-11-06 22:16:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:55,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:55,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:55,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021644260] [2023-11-06 22:16:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:55,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:55,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:55,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:16:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:55,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:16:55,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:16:55,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:16:55,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:55,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094939932] [2023-11-06 22:16:55,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:55,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021644260] [2023-11-06 22:16:55,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021644260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:55,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:55,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-06 22:16:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606032573] [2023-11-06 22:16:55,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:16:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:16:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:16:55,466 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:55,663 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2023-11-06 22:16:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-06 22:16:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:55,665 INFO L225 Difference]: With dead ends: 84 [2023-11-06 22:16:55,665 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 22:16:55,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 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 22:16:55,667 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:55,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:16:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 22:16:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-11-06 22:16:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-11-06 22:16:55,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2023-11-06 22:16:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:55,679 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-11-06 22:16:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-11-06 22:16:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:16:55,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:55,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:55,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:55,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 22:16:55,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:55,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 2 times [2023-11-06 22:16:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070286510] [2023-11-06 22:16:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:55,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:55,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009342036] [2023-11-06 22:16:55,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:16:55,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:55,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:55,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:55,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:16:56,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:16:56,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:56,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:16:56,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:16:56,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:16:56,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:56,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070286510] [2023-11-06 22:16:56,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:56,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009342036] [2023-11-06 22:16:56,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009342036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:56,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:56,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-06 22:16:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526272744] [2023-11-06 22:16:56,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:56,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:16:56,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:16:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:56,267 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:56,512 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2023-11-06 22:16:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:16:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-06 22:16:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:56,514 INFO L225 Difference]: With dead ends: 102 [2023-11-06 22:16:56,515 INFO L226 Difference]: Without dead ends: 79 [2023-11-06 22:16:56,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 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 22:16:56,517 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:56,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 66 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:16:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-06 22:16:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2023-11-06 22:16:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-06 22:16:56,536 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2023-11-06 22:16:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:56,536 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-06 22:16:56,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-06 22:16:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:16:56,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:56,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:56,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:56,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:56,746 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:56,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2023-11-06 22:16:56,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:56,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885266923] [2023-11-06 22:16:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:56,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366373774] [2023-11-06 22:16:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:16:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:56,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:56,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:16:56,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:16:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:56,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:16:56,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:57,025 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 22:16:57,094 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:57,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-06 22:16:57,135 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 19 treesize of output 13 [2023-11-06 22:16:57,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:57,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-11-06 22:16:57,258 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 13 [2023-11-06 22:16:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:57,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:57,739 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 20 treesize of output 18 [2023-11-06 22:16:57,743 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 22 treesize of output 18 [2023-11-06 22:16:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:57,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:57,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885266923] [2023-11-06 22:16:57,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:57,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366373774] [2023-11-06 22:16:57,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366373774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:57,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:57,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2023-11-06 22:16:57,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44946257] [2023-11-06 22:16:57,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:57,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:16:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:16:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:16:57,796 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:58,789 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2023-11-06 22:16:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:16:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-06 22:16:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:58,791 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:16:58,791 INFO L226 Difference]: Without dead ends: 103 [2023-11-06 22:16:58,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:16:58,793 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:58,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 232 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:16:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-06 22:16:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 63. [2023-11-06 22:16:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-11-06 22:16:58,812 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 30 [2023-11-06 22:16:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:58,813 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-11-06 22:16:58,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-11-06 22:16:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:16:58,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:58,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:58,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:16:59,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:59,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:59,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 3 times [2023-11-06 22:16:59,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:59,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958424871] [2023-11-06 22:16:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:59,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:59,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:59,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763590245] [2023-11-06 22:16:59,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:16:59,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:59,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:59,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:59,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:16:59,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:16:59,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:59,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-06 22:16:59,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:59,328 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 9 [2023-11-06 22:16:59,399 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 25 treesize of output 13 [2023-11-06 22:16:59,462 INFO L322 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-06 22:16:59,463 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 1 case distinctions, treesize of input 29 treesize of output 17 [2023-11-06 22:16:59,696 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 29 treesize of output 17 [2023-11-06 22:16:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:59,788 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:59,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2023-11-06 22:16:59,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:59,881 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:59,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2023-11-06 22:17:00,070 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 13 [2023-11-06 22:17:00,170 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:00,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-06 22:17:00,285 INFO L322 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-11-06 22:17:00,286 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 2 case distinctions, treesize of input 29 treesize of output 34 [2023-11-06 22:17:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:00,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:03,342 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 458 treesize of output 434 [2023-11-06 22:17:04,443 INFO L322 Elim1Store]: treesize reduction 33, result has 23.3 percent of original size [2023-11-06 22:17:04,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4126096 treesize of output 3841324 [2023-11-06 22:17:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:05,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:05,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958424871] [2023-11-06 22:17:05,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:05,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763590245] [2023-11-06 22:17:05,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763590245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:05,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:05,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 47 [2023-11-06 22:17:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678875979] [2023-11-06 22:17:05,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 22:17:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 22:17:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:17:05,895 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:12,099 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2023-11-06 22:17:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 22:17:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 22:17:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:12,101 INFO L225 Difference]: With dead ends: 133 [2023-11-06 22:17:12,101 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 22:17:12,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1200, Invalid=6632, Unknown=0, NotChecked=0, Total=7832 [2023-11-06 22:17:12,106 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 335 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:12,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 178 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:17:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 22:17:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 65. [2023-11-06 22:17:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-11-06 22:17:12,124 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 32 [2023-11-06 22:17:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:12,125 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-11-06 22:17:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-11-06 22:17:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:17:12,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:12,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:12,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:12,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:12,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:12,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash -441278722, now seen corresponding path program 3 times [2023-11-06 22:17:12,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:12,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579251603] [2023-11-06 22:17:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:12,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:12,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271290592] [2023-11-06 22:17:12,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:17:12,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:12,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:12,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:17:12,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:17:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:12,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 22:17:12,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:12,696 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 22:17:12,819 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:12,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-06 22:17:12,884 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:12,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-06 22:17:12,944 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 19 treesize of output 13 [2023-11-06 22:17:13,104 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:13,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-11-06 22:17:13,161 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:13,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-11-06 22:17:13,219 INFO L322 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-11-06 22:17:13,220 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 2 case distinctions, treesize of input 31 treesize of output 36 [2023-11-06 22:17:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:13,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:17:15,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:15,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579251603] [2023-11-06 22:17:15,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:15,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271290592] [2023-11-06 22:17:15,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271290592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:15,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:15,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2023-11-06 22:17:15,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584889364] [2023-11-06 22:17:15,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:15,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 22:17:15,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 22:17:15,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1746, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:17:15,433 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:25,038 INFO L93 Difference]: Finished difference Result 211 states and 244 transitions. [2023-11-06 22:17:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-06 22:17:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-06 22:17:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:25,042 INFO L225 Difference]: With dead ends: 211 [2023-11-06 22:17:25,042 INFO L226 Difference]: Without dead ends: 170 [2023-11-06 22:17:25,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1687, Invalid=9443, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 22:17:25,050 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 279 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:25,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 299 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 22:17:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-06 22:17:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2023-11-06 22:17:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1333333333333333) internal successors, (136), 120 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2023-11-06 22:17:25,117 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 40 [2023-11-06 22:17:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:25,118 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2023-11-06 22:17:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2023-11-06 22:17:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:17:25,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:25,132 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:25,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:17:25,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:25,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:25,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1107478518, now seen corresponding path program 4 times [2023-11-06 22:17:25,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:25,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728193167] [2023-11-06 22:17:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:25,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:25,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:25,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154936375] [2023-11-06 22:17:25,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:17:25,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:25,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:25,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:17:25,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:17:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:25,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:17:25,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:17:25,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:17:25,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:25,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728193167] [2023-11-06 22:17:25,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:25,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154936375] [2023-11-06 22:17:25,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154936375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:25,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-06 22:17:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070671753] [2023-11-06 22:17:25,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:25,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:17:25,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:17:25,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:17:25,767 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:26,132 INFO L93 Difference]: Finished difference Result 218 states and 240 transitions. [2023-11-06 22:17:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:17:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-06 22:17:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:26,134 INFO L225 Difference]: With dead ends: 218 [2023-11-06 22:17:26,134 INFO L226 Difference]: Without dead ends: 116 [2023-11-06 22:17:26,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:17:26,136 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:26,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 99 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:17:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-06 22:17:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2023-11-06 22:17:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-11-06 22:17:26,183 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 40 [2023-11-06 22:17:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:26,184 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-11-06 22:17:26,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-11-06 22:17:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:17:26,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:26,185 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:26,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:26,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:26,393 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:26,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2076403198, now seen corresponding path program 4 times [2023-11-06 22:17:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117222242] [2023-11-06 22:17:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:26,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:26,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548237547] [2023-11-06 22:17:26,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:17:26,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:26,440 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:26,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:17:26,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:17:26,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:26,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:17:26,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:17:26,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:17:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117222242] [2023-11-06 22:17:26,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548237547] [2023-11-06 22:17:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548237547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:26,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:26,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2023-11-06 22:17:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489878823] [2023-11-06 22:17:26,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:17:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:17:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:17:26,834 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:27,458 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2023-11-06 22:17:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:17:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-06 22:17:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:27,460 INFO L225 Difference]: With dead ends: 170 [2023-11-06 22:17:27,461 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:17:27,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:17:27,463 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 194 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:27,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 167 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:17:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:17:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2023-11-06 22:17:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-11-06 22:17:27,497 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 42 [2023-11-06 22:17:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:27,497 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-11-06 22:17:27,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-11-06 22:17:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:17:27,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:27,498 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:27,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:17:27,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:27,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -197809856, now seen corresponding path program 5 times [2023-11-06 22:17:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:27,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4557069] [2023-11-06 22:17:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:27,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:27,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287769488] [2023-11-06 22:17:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:17:27,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:27,732 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:27,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:17:28,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-06 22:17:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:28,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:17:28,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:17:28,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:17:28,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4557069] [2023-11-06 22:17:28,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287769488] [2023-11-06 22:17:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287769488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:28,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:28,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-11-06 22:17:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948053] [2023-11-06 22:17:28,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:17:28,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:17:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:17:28,572 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:28,972 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2023-11-06 22:17:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:17:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-06 22:17:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:28,974 INFO L225 Difference]: With dead ends: 156 [2023-11-06 22:17:28,974 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 22:17:28,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:17:28,976 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:28,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 95 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:17:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 22:17:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 89. [2023-11-06 22:17:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2023-11-06 22:17:29,022 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 44 [2023-11-06 22:17:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:29,022 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2023-11-06 22:17:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2023-11-06 22:17:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 22:17:29,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:29,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:29,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:17:29,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:29,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -452760008, now seen corresponding path program 6 times [2023-11-06 22:17:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145968980] [2023-11-06 22:17:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:29,246 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602184568] [2023-11-06 22:17:29,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:17:29,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:29,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:29,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b9e78e-783e-4633-9e79-6ade57908c41/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:17:29,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-06 22:17:29,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:29,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:17:29,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:29,742 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 22:17:29,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:29,837 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 27 treesize of output 11 [2023-11-06 22:17:29,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:29,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-06 22:17:30,038 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:30,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-06 22:17:30,120 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 19 treesize of output 13 [2023-11-06 22:17:30,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:30,258 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:30,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2023-11-06 22:17:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:30,403 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:30,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-06 22:17:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:30,493 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:17:30,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2023-11-06 22:17:30,611 INFO L322 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-11-06 22:17:30,611 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 2 case distinctions, treesize of input 31 treesize of output 36 [2023-11-06 22:17:30,839 INFO L322 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-11-06 22:17:30,839 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 2 case distinctions, treesize of input 47 treesize of output 48 [2023-11-06 22:17:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:31,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:53,317 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 1980 treesize of output 1852