./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:03,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:04,028 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:26:04,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:04,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:04,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:04,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:04,071 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:04,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:04,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:04,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:04,074 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:04,074 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:04,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:04,075 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:26:04,076 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:04,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:04,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:04,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:04,078 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:26:04,078 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:04,083 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:26:04,084 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:04,084 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:26:04,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:04,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:04,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:04,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:04,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:04,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:04,087 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:04,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:26:04,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:04,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:04,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:04,089 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:26:04,089 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:04,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:04,090 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:04,090 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_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 [2023-11-12 02:26:04,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:04,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:04,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:04,408 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:04,409 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:04,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2023-11-12 02:26:07,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:26:07,713 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:26:07,714 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2023-11-12 02:26:07,722 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/data/fdccdae51/ba9907f6ab6a423fb028abbd7c11b389/FLAGa5510037d [2023-11-12 02:26:07,740 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/data/fdccdae51/ba9907f6ab6a423fb028abbd7c11b389 [2023-11-12 02:26:07,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:26:07,751 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:26:07,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:07,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:26:07,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:26:07,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:07" (1/1) ... [2023-11-12 02:26:07,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aab5a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:07, skipping insertion in model container [2023-11-12 02:26:07,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:07" (1/1) ... [2023-11-12 02:26:07,788 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:26:07,936 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_23f83ef5-2192-46c2-9548-2b5558f12416/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c[331,344] [2023-11-12 02:26:07,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:07,972 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:26:07,982 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_23f83ef5-2192-46c2-9548-2b5558f12416/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c[331,344] [2023-11-12 02:26:08,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:08,017 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:26:08,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08 WrapperNode [2023-11-12 02:26:08,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:08,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:08,019 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:26:08,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:26:08,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,074 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-11-12 02:26:08,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:08,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:26:08,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:26:08,078 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:26:08,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,092 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:26:08,107 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:26:08,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:26:08,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:26:08,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (1/1) ... [2023-11-12 02:26:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:08,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:08,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:26:08,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:26:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:26:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:26:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:26:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:26:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:26:08,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:26:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:26:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:26:08,316 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:26:08,319 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:26:08,490 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:26:08,497 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:26:08,497 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:26:08,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:08 BoogieIcfgContainer [2023-11-12 02:26:08,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:26:08,502 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:26:08,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:26:08,505 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:26:08,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:26:07" (1/3) ... [2023-11-12 02:26:08,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5523c18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:08, skipping insertion in model container [2023-11-12 02:26:08,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:08" (2/3) ... [2023-11-12 02:26:08,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5523c18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:08, skipping insertion in model container [2023-11-12 02:26:08,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:08" (3/3) ... [2023-11-12 02:26:08,508 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2023-11-12 02:26:08,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:26:08,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:26:08,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:26:08,599 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50110738, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:26:08,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:26:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 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) [2023-11-12 02:26:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:26:08,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:08,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:08,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:08,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2023-11-12 02:26:08,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:08,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244735654] [2023-11-12 02:26:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:08,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:08,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113516968] [2023-11-12 02:26:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:08,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:08,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:26:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:08,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:26:08,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:08,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244735654] [2023-11-12 02:26:08,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113516968] [2023-11-12 02:26:08,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113516968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:08,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:08,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:26:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489702963] [2023-11-12 02:26:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:08,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:26:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:26:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:26:08,915 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.5) internal successors, (30), 21 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-11-12 02:26:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:08,931 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-12 02:26:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:26:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-11-12 02:26:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:08,940 INFO L225 Difference]: With dead ends: 41 [2023-11-12 02:26:08,941 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 02:26:08,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:26:08,947 INFO L413 NwaCegarLoop]: 26 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, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:08,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:26:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 02:26:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-12 02:26:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2023-11-12 02:26:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-12 02:26:08,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2023-11-12 02:26:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:08,981 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-12 02:26:08,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-11-12 02:26:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-12 02:26:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:26:08,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:08,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:08,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:26:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:09,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:09,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2023-11-12 02:26:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:09,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690310813] [2023-11-12 02:26:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:09,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:09,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896607444] [2023-11-12 02:26:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:09,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:09,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:09,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:26:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:09,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:26:09,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:09,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:09,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:09,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690310813] [2023-11-12 02:26:09,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896607444] [2023-11-12 02:26:09,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896607444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:09,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:09,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:26:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773723218] [2023-11-12 02:26:09,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:09,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:26:09,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:26:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:26:09,420 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-12 02:26:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:09,463 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-11-12 02:26:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:26:09,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-12 02:26:09,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:09,465 INFO L225 Difference]: With dead ends: 40 [2023-11-12 02:26:09,465 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 02:26:09,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:26:09,467 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:09,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:26:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 02:26:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2023-11-12 02:26:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2023-11-12 02:26:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-12 02:26:09,478 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-11-12 02:26:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:09,478 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-12 02:26:09,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-12 02:26:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-12 02:26:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:26:09,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:09,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:09,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:09,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:26:09,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:09,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 784383783, now seen corresponding path program 1 times [2023-11-12 02:26:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:09,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486345579] [2023-11-12 02:26:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:09,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675236690] [2023-11-12 02:26:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:09,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:09,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:09,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:09,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:26:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:09,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:26:09,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:09,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:09,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486345579] [2023-11-12 02:26:09,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:09,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675236690] [2023-11-12 02:26:09,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675236690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:09,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:09,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-12 02:26:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788730532] [2023-11-12 02:26:09,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:09,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:26:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:26:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:09,944 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2023-11-12 02:26:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:10,048 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-11-12 02:26:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:26:10,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) Word has length 16 [2023-11-12 02:26:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:10,050 INFO L225 Difference]: With dead ends: 68 [2023-11-12 02:26:10,050 INFO L226 Difference]: Without dead ends: 59 [2023-11-12 02:26:10,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:26:10,052 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:10,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 42 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:26:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-12 02:26:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2023-11-12 02:26:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2023-11-12 02:26:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-11-12 02:26:10,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 16 [2023-11-12 02:26:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:10,062 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-11-12 02:26:10,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2023-11-12 02:26:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-11-12 02:26:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:26:10,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:10,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:10,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:26:10,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:10,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash -520466666, now seen corresponding path program 2 times [2023-11-12 02:26:10,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:10,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793873361] [2023-11-12 02:26:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:10,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:10,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104569749] [2023-11-12 02:26:10,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:26:10,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:10,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:10,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:10,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:26:10,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:26:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:10,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:26:10,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:26:10,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:10,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793873361] [2023-11-12 02:26:10,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104569749] [2023-11-12 02:26:10,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104569749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:10,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:10,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:26:10,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533290730] [2023-11-12 02:26:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:10,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:26:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:26:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:26:10,869 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-12 02:26:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:10,976 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-11-12 02:26:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:26:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 31 [2023-11-12 02:26:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:10,982 INFO L225 Difference]: With dead ends: 42 [2023-11-12 02:26:10,982 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 02:26:10,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:26:10,991 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:10,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:26:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 02:26:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-12 02:26:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2023-11-12 02:26:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-11-12 02:26:11,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 31 [2023-11-12 02:26:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:11,011 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-11-12 02:26:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-12 02:26:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-11-12 02:26:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:26:11,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:11,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:11,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:11,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:11,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:11,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash -520526248, now seen corresponding path program 1 times [2023-11-12 02:26:11,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:11,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604222982] [2023-11-12 02:26:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:11,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:11,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020980039] [2023-11-12 02:26:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:11,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:11,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:11,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:26:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:11,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:26:11,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:11,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:11,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604222982] [2023-11-12 02:26:11,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020980039] [2023-11-12 02:26:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020980039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:11,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:11,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-12 02:26:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669656076] [2023-11-12 02:26:11,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:26:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:26:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:26:11,614 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 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) [2023-11-12 02:26:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:11,902 INFO L93 Difference]: Finished difference Result 211 states and 259 transitions. [2023-11-12 02:26:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:26:11,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 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 31 [2023-11-12 02:26:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:11,909 INFO L225 Difference]: With dead ends: 211 [2023-11-12 02:26:11,910 INFO L226 Difference]: Without dead ends: 196 [2023-11-12 02:26:11,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:26:11,911 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 512 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:11,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 97 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:26:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-12 02:26:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 70. [2023-11-12 02:26:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 69 states have internal predecessors, (93), 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) [2023-11-12 02:26:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2023-11-12 02:26:11,946 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 31 [2023-11-12 02:26:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:11,946 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2023-11-12 02:26:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 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) [2023-11-12 02:26:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2023-11-12 02:26:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-12 02:26:11,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:11,950 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:11,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:12,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:12,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:12,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1117364680, now seen corresponding path program 2 times [2023-11-12 02:26:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956972511] [2023-11-12 02:26:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:12,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:12,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487867968] [2023-11-12 02:26:12,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:26:12,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:12,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:12,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:12,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:26:12,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:26:12,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:12,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:26:12,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-12 02:26:12,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:12,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:12,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956972511] [2023-11-12 02:26:12,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:12,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487867968] [2023-11-12 02:26:12,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487867968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:12,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392490828] [2023-11-12 02:26:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:26:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:26:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:26:12,956 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-11-12 02:26:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:13,061 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2023-11-12 02:26:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:26:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 61 [2023-11-12 02:26:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:13,063 INFO L225 Difference]: With dead ends: 78 [2023-11-12 02:26:13,063 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 02:26:13,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:26:13,064 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:13,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:26:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 02:26:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-12 02:26:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 states have internal predecessors, (100), 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) [2023-11-12 02:26:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2023-11-12 02:26:13,078 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 61 [2023-11-12 02:26:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:13,079 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2023-11-12 02:26:13,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-11-12 02:26:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2023-11-12 02:26:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-12 02:26:13,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:13,080 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:13,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:13,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:13,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:13,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 824832363, now seen corresponding path program 1 times [2023-11-12 02:26:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:13,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255064756] [2023-11-12 02:26:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:13,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:13,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140365621] [2023-11-12 02:26:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:13,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:13,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:13,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:26:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:13,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:26:13,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:26:13,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:26:14,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255064756] [2023-11-12 02:26:14,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140365621] [2023-11-12 02:26:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140365621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:14,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-12 02:26:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492298273] [2023-11-12 02:26:14,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:26:14,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:26:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:26:14,100 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 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) [2023-11-12 02:26:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:14,877 INFO L93 Difference]: Finished difference Result 568 states and 691 transitions. [2023-11-12 02:26:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:26:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 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 67 [2023-11-12 02:26:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:14,881 INFO L225 Difference]: With dead ends: 568 [2023-11-12 02:26:14,881 INFO L226 Difference]: Without dead ends: 547 [2023-11-12 02:26:14,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:26:14,884 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 933 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:14,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 206 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:26:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-12 02:26:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 136. [2023-11-12 02:26:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.362962962962963) internal successors, (184), 135 states have internal predecessors, (184), 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) [2023-11-12 02:26:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 184 transitions. [2023-11-12 02:26:14,912 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 184 transitions. Word has length 67 [2023-11-12 02:26:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:14,913 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 184 transitions. [2023-11-12 02:26:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 25 states have internal predecessors, (119), 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) [2023-11-12 02:26:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 184 transitions. [2023-11-12 02:26:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-12 02:26:14,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:14,916 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:14,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 02:26:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:15,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1889532203, now seen corresponding path program 2 times [2023-11-12 02:26:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802936298] [2023-11-12 02:26:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:15,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:15,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:15,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367436893] [2023-11-12 02:26:15,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:26:15,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:15,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:15,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:15,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:26:15,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:26:15,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:15,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:26:15,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:26:16,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:26:17,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:17,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802936298] [2023-11-12 02:26:17,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367436893] [2023-11-12 02:26:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367436893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:17,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:17,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-11-12 02:26:17,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734698880] [2023-11-12 02:26:17,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-12 02:26:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-12 02:26:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2023-11-12 02:26:17,274 INFO L87 Difference]: Start difference. First operand 136 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 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) [2023-11-12 02:26:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:19,611 INFO L93 Difference]: Finished difference Result 1168 states and 1423 transitions. [2023-11-12 02:26:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-12 02:26:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 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 127 [2023-11-12 02:26:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:19,619 INFO L225 Difference]: With dead ends: 1168 [2023-11-12 02:26:19,619 INFO L226 Difference]: Without dead ends: 1147 [2023-11-12 02:26:19,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2023-11-12 02:26:19,624 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2130 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:19,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2130 Valid, 422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:26:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-12 02:26:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 256. [2023-11-12 02:26:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.380392156862745) internal successors, (352), 255 states have internal predecessors, (352), 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) [2023-11-12 02:26:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 352 transitions. [2023-11-12 02:26:19,671 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 352 transitions. Word has length 127 [2023-11-12 02:26:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:19,673 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 352 transitions. [2023-11-12 02:26:19,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.78) internal successors, (239), 49 states have internal predecessors, (239), 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) [2023-11-12 02:26:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 352 transitions. [2023-11-12 02:26:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-12 02:26:19,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:19,685 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:19,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:19,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:19,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:19,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1454397269, now seen corresponding path program 3 times [2023-11-12 02:26:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:19,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989864444] [2023-11-12 02:26:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:19,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726352050] [2023-11-12 02:26:19,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:26:19,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:19,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:19,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:19,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:26:20,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:26:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:20,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:26:20,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2023-11-12 02:26:21,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2023-11-12 02:26:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989864444] [2023-11-12 02:26:22,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726352050] [2023-11-12 02:26:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726352050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:22,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:26:22,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-12 02:26:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142001872] [2023-11-12 02:26:22,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:22,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:26:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:26:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:26:22,848 INFO L87 Difference]: Start difference. First operand 256 states and 352 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2023-11-12 02:26:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:23,279 INFO L93 Difference]: Finished difference Result 282 states and 385 transitions. [2023-11-12 02:26:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:26:23,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 247 [2023-11-12 02:26:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:23,282 INFO L225 Difference]: With dead ends: 282 [2023-11-12 02:26:23,282 INFO L226 Difference]: Without dead ends: 280 [2023-11-12 02:26:23,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:26:23,283 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:23,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 86 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:26:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-12 02:26:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-11-12 02:26:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.3620071684587813) internal successors, (380), 279 states have internal predecessors, (380), 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) [2023-11-12 02:26:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 380 transitions. [2023-11-12 02:26:23,323 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 380 transitions. Word has length 247 [2023-11-12 02:26:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:23,324 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 380 transitions. [2023-11-12 02:26:23,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2023-11-12 02:26:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 380 transitions. [2023-11-12 02:26:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-12 02:26:23,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:23,328 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:23,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:23,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:23,535 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:23,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:23,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1033805559, now seen corresponding path program 4 times [2023-11-12 02:26:23,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:23,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915251614] [2023-11-12 02:26:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:23,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:23,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:23,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663668263] [2023-11-12 02:26:23,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:26:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:23,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:23,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f83ef5-2192-46c2-9548-2b5558f12416/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process