./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b0ae54926d75c04421ee4ea5930c958fb8ba0ccacc4d56435da8ae7b298172d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:55:39,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:55:39,982 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:55:39,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:55:39,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:55:40,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:55:40,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:55:40,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:55:40,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:55:40,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:55:40,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:55:40,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:55:40,018 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:55:40,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:55:40,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:55:40,020 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:55:40,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:55:40,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:55:40,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:55:40,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:55:40,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:55:40,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:55:40,024 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:55:40,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:55:40,025 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:55:40,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:55:40,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:55:40,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:55:40,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:55:40,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:55:40,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:55:40,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:55:40,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:55:40,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:55:40,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:55:40,031 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:55:40,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:55:40,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:55:40,033 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:55:40,033 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_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b0ae54926d75c04421ee4ea5930c958fb8ba0ccacc4d56435da8ae7b298172d [2023-11-06 22:55:40,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:55:40,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:55:40,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:55:40,363 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:55:40,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:55:40,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2023-11-06 22:55:43,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:55:43,778 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:55:43,779 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2023-11-06 22:55:43,788 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/data/db6f3da44/2c0b81d55e4c4ca7b10f561833712603/FLAG0c33ec28d [2023-11-06 22:55:43,807 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/data/db6f3da44/2c0b81d55e4c4ca7b10f561833712603 [2023-11-06 22:55:43,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:55:43,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:55:43,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:55:43,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:55:43,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:55:43,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344685ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43, skipping insertion in model container [2023-11-06 22:55:43,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,859 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:55:44,059 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_23f297f4-6ccb-471f-981c-b59acfb9b68e/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] [2023-11-06 22:55:44,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:55:44,088 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:55:44,099 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_23f297f4-6ccb-471f-981c-b59acfb9b68e/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] [2023-11-06 22:55:44,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:55:44,120 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:55:44,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44 WrapperNode [2023-11-06 22:55:44,120 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:55:44,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:55:44,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:55:44,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:55:44,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,154 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-11-06 22:55:44,155 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:55:44,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:55:44,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:55:44,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:55:44,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,167 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,167 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,189 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:55:44,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:55:44,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:55:44,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:55:44,194 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (1/1) ... [2023-11-06 22:55:44,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:55:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:44,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:55:44,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:55:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:55:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:55:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:55:44,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:55:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:55:44,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:55:44,349 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:55:44,351 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:55:44,491 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:55:44,498 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:55:44,498 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:55:44,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:44 BoogieIcfgContainer [2023-11-06 22:55:44,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:55:44,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:55:44,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:55:44,506 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:55:44,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:43" (1/3) ... [2023-11-06 22:55:44,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d18bcea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:44, skipping insertion in model container [2023-11-06 22:55:44,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:44" (2/3) ... [2023-11-06 22:55:44,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d18bcea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:44, skipping insertion in model container [2023-11-06 22:55:44,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:44" (3/3) ... [2023-11-06 22:55:44,509 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2023-11-06 22:55:44,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:55:44,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:55:44,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:55:44,582 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@61e12205, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:55:44,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:55:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:55:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 22:55:44,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:44,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:44,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:44,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2023-11-06 22:55:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:44,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920399631] [2023-11-06 22:55:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:44,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:44,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920399631] [2023-11-06 22:55:44,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:55:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265288184] [2023-11-06 22:55:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:44,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:44,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:55:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:44,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:55:44,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:44,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:44,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265288184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:44,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:44,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:55:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199886946] [2023-11-06 22:55:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:44,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:55:44,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:55:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:55:44,968 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:44,989 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2023-11-06 22:55:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:55:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 22:55:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:45,006 INFO L225 Difference]: With dead ends: 37 [2023-11-06 22:55:45,006 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 22:55:45,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:55:45,014 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 [2023-11-06 22:55:45,016 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] [2023-11-06 22:55:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 22:55:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 22:55:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-06 22:55:45,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2023-11-06 22:55:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:45,061 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-06 22:55:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-06 22:55:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:55:45,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:45,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:45,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:45,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:55:45,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:45,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2023-11-06 22:55:45,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578411594] [2023-11-06 22:55:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:45,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578411594] [2023-11-06 22:55:45,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:55:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876167506] [2023-11-06 22:55:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:45,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:45,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:55:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:45,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:55:45,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:45,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:45,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876167506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:45,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:45,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:55:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710313520] [2023-11-06 22:55:45,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:55:45,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:55:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:55:45,437 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:45,468 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2023-11-06 22:55:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:55:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:55:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:45,470 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:55:45,471 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 22:55:45,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:55:45,473 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:45,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:55:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 22:55:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 22:55:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-06 22:55:45,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-11-06 22:55:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:45,489 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-06 22:55:45,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-06 22:55:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:55:45,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:45,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:45,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:45,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:45,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:45,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2023-11-06 22:55:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145756666] [2023-11-06 22:55:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:45,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:45,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223062286] [2023-11-06 22:55:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:45,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:45,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:55:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:45,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:55:45,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:45,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145756666] [2023-11-06 22:55:45,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223062286] [2023-11-06 22:55:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223062286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:45,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:45,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:55:45,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458290577] [2023-11-06 22:55:45,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:45,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:55:45,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:55:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:55:45,832 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:45,857 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-06 22:55:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:55:45,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 22:55:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:45,859 INFO L225 Difference]: With dead ends: 30 [2023-11-06 22:55:45,859 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 22:55:45,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:55:45,861 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:45,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:55:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 22:55:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-06 22:55:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-06 22:55:45,868 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-11-06 22:55:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:45,869 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-06 22:55:45,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-06 22:55:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:55:45,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:45,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:45,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:46,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:46,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:46,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2023-11-06 22:55:46,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:46,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133285136] [2023-11-06 22:55:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:46,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379002085] [2023-11-06 22:55:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:46,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:46,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:46,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:55:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:46,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:55:46,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:46,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133285136] [2023-11-06 22:55:46,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:46,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379002085] [2023-11-06 22:55:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379002085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:46,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:55:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321757648] [2023-11-06 22:55:46,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:55:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:55:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:55:46,387 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:46,446 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-06 22:55:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:55:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 22:55:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:46,448 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:55:46,448 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 22:55:46,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:55:46,450 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:46,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:55:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 22:55:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 22:55:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:55:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-06 22:55:46,459 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2023-11-06 22:55:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:46,460 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-06 22:55:46,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-06 22:55:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:55:46,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:46,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:46,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:55:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 22:55:46,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:46,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1647533572, now seen corresponding path program 1 times [2023-11-06 22:55:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:46,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630518060] [2023-11-06 22:55:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:46,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:46,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160973693] [2023-11-06 22:55:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:46,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:46,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:46,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:55:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:46,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:55:46,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:46,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:46,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630518060] [2023-11-06 22:55:46,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160973693] [2023-11-06 22:55:46,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160973693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:46,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:55:46,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-06 22:55:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986783258] [2023-11-06 22:55:46,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:55:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:55:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:55:46,872 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:46,980 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-11-06 22:55:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:55:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 22:55:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:46,985 INFO L225 Difference]: With dead ends: 62 [2023-11-06 22:55:46,985 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 22:55:46,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:55:46,992 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 101 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:55:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 22:55:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2023-11-06 22:55:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:55:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-06 22:55:47,005 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 13 [2023-11-06 22:55:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:47,006 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-06 22:55:47,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-06 22:55:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:55:47,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:47,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:47,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:47,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:47,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:47,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash -791761799, now seen corresponding path program 1 times [2023-11-06 22:55:47,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:47,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065391087] [2023-11-06 22:55:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:47,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:47,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288429305] [2023-11-06 22:55:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:47,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:47,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:47,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:55:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:47,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:55:47,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:47,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:47,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:47,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065391087] [2023-11-06 22:55:47,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:47,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288429305] [2023-11-06 22:55:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288429305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:47,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:55:47,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-06 22:55:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428618434] [2023-11-06 22:55:47,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:47,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:55:47,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:55:47,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:55:47,478 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:47,622 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2023-11-06 22:55:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:55:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 22:55:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:47,624 INFO L225 Difference]: With dead ends: 87 [2023-11-06 22:55:47,624 INFO L226 Difference]: Without dead ends: 80 [2023-11-06 22:55:47,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:55:47,626 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:47,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 112 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:55:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-06 22:55:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-11-06 22:55:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 62 states have internal predecessors, (80), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:55:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2023-11-06 22:55:47,640 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 14 [2023-11-06 22:55:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:47,641 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2023-11-06 22:55:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2023-11-06 22:55:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:55:47,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:47,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:47,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:47,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:47,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:47,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash -789974339, now seen corresponding path program 1 times [2023-11-06 22:55:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:47,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191477341] [2023-11-06 22:55:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:47,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781251117] [2023-11-06 22:55:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:47,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:47,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:47,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:55:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:47,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:55:47,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:48,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:48,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191477341] [2023-11-06 22:55:48,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781251117] [2023-11-06 22:55:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781251117] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:48,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:55:48,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-06 22:55:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106124485] [2023-11-06 22:55:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:55:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:55:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:55:48,198 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:50,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:55:52,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:55:54,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:55:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:54,419 INFO L93 Difference]: Finished difference Result 135 states and 173 transitions. [2023-11-06 22:55:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:55:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 22:55:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:54,422 INFO L225 Difference]: With dead ends: 135 [2023-11-06 22:55:54,422 INFO L226 Difference]: Without dead ends: 133 [2023-11-06 22:55:54,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:55:54,424 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:54,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 69 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-11-06 22:55:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-06 22:55:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2023-11-06 22:55:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.2875) internal successors, (103), 88 states have internal predecessors, (103), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:55:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2023-11-06 22:55:54,461 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 14 [2023-11-06 22:55:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:54,461 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2023-11-06 22:55:54,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2023-11-06 22:55:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:55:54,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:54,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:54,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:54,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:54,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash -339337867, now seen corresponding path program 1 times [2023-11-06 22:55:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72989892] [2023-11-06 22:55:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:54,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:54,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647088804] [2023-11-06 22:55:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:54,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:54,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:55:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:54,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:55:54,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:54,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:54,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:54,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72989892] [2023-11-06 22:55:54,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:54,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647088804] [2023-11-06 22:55:54,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647088804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:54,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:55:54,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-11-06 22:55:54,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370210580] [2023-11-06 22:55:54,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:54,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:55:54,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:55:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:55:54,910 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:55,051 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2023-11-06 22:55:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:55:55,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-06 22:55:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:55,055 INFO L225 Difference]: With dead ends: 122 [2023-11-06 22:55:55,055 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 22:55:55,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:55:55,056 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:55,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:55:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 22:55:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-06 22:55:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.2375) internal successors, (99), 85 states have internal predecessors, (99), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:55:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2023-11-06 22:55:55,087 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 20 [2023-11-06 22:55:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:55,087 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2023-11-06 22:55:55,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2023-11-06 22:55:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:55:55,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:55,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:55,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:55,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:55,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2118336314, now seen corresponding path program 1 times [2023-11-06 22:55:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903313938] [2023-11-06 22:55:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:55,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:55,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209288785] [2023-11-06 22:55:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:55,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:55,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:55,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:55:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:55,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:55:55,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:55,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:55:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903313938] [2023-11-06 22:55:55,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209288785] [2023-11-06 22:55:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209288785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:55,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:55:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080097793] [2023-11-06 22:55:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:55,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:55:55,441 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:55:55,485 INFO L93 Difference]: Finished difference Result 134 states and 159 transitions. [2023-11-06 22:55:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-06 22:55:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:55:55,487 INFO L225 Difference]: With dead ends: 134 [2023-11-06 22:55:55,487 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 22:55:55,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:55:55,491 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:55:55,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:55:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 22:55:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-06 22:55:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 72 states have internal predecessors, (84), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:55:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-11-06 22:55:55,525 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 20 [2023-11-06 22:55:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:55:55,526 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-11-06 22:55:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:55:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-11-06 22:55:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 22:55:55,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:55:55,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:55,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:55,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:55:55,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1149777120, now seen corresponding path program 1 times [2023-11-06 22:55:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:55,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915224862] [2023-11-06 22:55:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:55,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:55:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514373211] [2023-11-06 22:55:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:55,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:55,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:55,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:55,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:55:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:55,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:55:55,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:56,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:56,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:56,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915224862] [2023-11-06 22:55:56,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:55:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514373211] [2023-11-06 22:55:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514373211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:56,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:55:56,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-11-06 22:55:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257632664] [2023-11-06 22:55:56,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:55:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:55:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:55:56,772 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:03,792 WARN L293 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:56:12,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:56:14,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:56:23,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:56:27,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:56:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:28,340 INFO L93 Difference]: Finished difference Result 159 states and 191 transitions. [2023-11-06 22:56:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:56:28,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-06 22:56:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:28,343 INFO L225 Difference]: With dead ends: 159 [2023-11-06 22:56:28,343 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 22:56:28,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=96, Invalid=283, Unknown=1, NotChecked=0, Total=380 [2023-11-06 22:56:28,345 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:28,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 162 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 118 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2023-11-06 22:56:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 22:56:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2023-11-06 22:56:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:56:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2023-11-06 22:56:28,387 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 23 [2023-11-06 22:56:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:28,387 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2023-11-06 22:56:28,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2023-11-06 22:56:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 22:56:28,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:28,392 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:28,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:28,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:56:28,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:28,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash 985579908, now seen corresponding path program 2 times [2023-11-06 22:56:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:28,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763814925] [2023-11-06 22:56:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:28,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:28,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210618348] [2023-11-06 22:56:28,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:28,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:28,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:28,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:28,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:56:28,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:56:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:28,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:56:28,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 22:56:28,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:56:28,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763814925] [2023-11-06 22:56:28,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210618348] [2023-11-06 22:56:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210618348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:28,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:56:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794745526] [2023-11-06 22:56:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:56:28,795 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:28,964 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2023-11-06 22:56:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:56:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 22:56:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:28,967 INFO L225 Difference]: With dead ends: 130 [2023-11-06 22:56:28,967 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 22:56:28,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:56:28,968 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:28,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 47 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:56:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 22:56:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2023-11-06 22:56:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 93 states have internal predecessors, (106), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 22:56:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2023-11-06 22:56:29,001 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 25 [2023-11-06 22:56:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:29,002 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2023-11-06 22:56:29,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2023-11-06 22:56:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:56:29,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:29,005 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:29,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:29,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:56:29,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:29,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1814741975, now seen corresponding path program 1 times [2023-11-06 22:56:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:29,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206353044] [2023-11-06 22:56:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:29,245 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478407720] [2023-11-06 22:56:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:29,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:29,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:29,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:56:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:29,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:56:29,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:29,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:56:29,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:29,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206353044] [2023-11-06 22:56:29,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:29,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478407720] [2023-11-06 22:56:29,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478407720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:29,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:29,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:56:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100553891] [2023-11-06 22:56:29,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:29,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:56:29,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:29,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:56:29,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:56:29,515 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:56:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:29,783 INFO L93 Difference]: Finished difference Result 236 states and 276 transitions. [2023-11-06 22:56:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:56:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-11-06 22:56:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:29,786 INFO L225 Difference]: With dead ends: 236 [2023-11-06 22:56:29,786 INFO L226 Difference]: Without dead ends: 215 [2023-11-06 22:56:29,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:56:29,788 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:29,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 156 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:56:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-06 22:56:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 130. [2023-11-06 22:56:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 110 states have internal predecessors, (128), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 22:56:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2023-11-06 22:56:29,831 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 31 [2023-11-06 22:56:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:29,832 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2023-11-06 22:56:29,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:56:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2023-11-06 22:56:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:56:29,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:29,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:29,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:30,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:56:30,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:30,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:30,042 INFO L85 PathProgramCache]: Analyzing trace with hash -815549923, now seen corresponding path program 2 times [2023-11-06 22:56:30,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097465104] [2023-11-06 22:56:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:30,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:30,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104311163] [2023-11-06 22:56:30,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:30,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:30,060 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:30,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:56:30,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:30,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:30,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:56:30,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:30,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:30,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097465104] [2023-11-06 22:56:30,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104311163] [2023-11-06 22:56:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104311163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:30,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:30,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-11-06 22:56:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334458464] [2023-11-06 22:56:30,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:30,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:56:30,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:56:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:56:30,599 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:56:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:30,791 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2023-11-06 22:56:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2023-11-06 22:56:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:30,793 INFO L225 Difference]: With dead ends: 164 [2023-11-06 22:56:30,793 INFO L226 Difference]: Without dead ends: 111 [2023-11-06 22:56:30,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:56:30,795 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:30,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 81 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:56:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-06 22:56:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2023-11-06 22:56:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:56:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2023-11-06 22:56:30,828 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 32 [2023-11-06 22:56:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:30,828 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2023-11-06 22:56:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:56:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2023-11-06 22:56:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:56:30,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:30,829 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:30,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:31,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:56:31,036 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:31,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 137209206, now seen corresponding path program 1 times [2023-11-06 22:56:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:31,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040948735] [2023-11-06 22:56:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:31,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:31,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384862379] [2023-11-06 22:56:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:31,052 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:31,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:56:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:31,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:56:31,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:31,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:31,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:31,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040948735] [2023-11-06 22:56:31,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:31,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384862379] [2023-11-06 22:56:31,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384862379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:31,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:31,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:56:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109888977] [2023-11-06 22:56:31,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:31,393 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:31,750 INFO L93 Difference]: Finished difference Result 280 states and 326 transitions. [2023-11-06 22:56:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:56:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-06 22:56:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:31,753 INFO L225 Difference]: With dead ends: 280 [2023-11-06 22:56:31,753 INFO L226 Difference]: Without dead ends: 273 [2023-11-06 22:56:31,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:56:31,755 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 183 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:31,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 195 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:56:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-06 22:56:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 251. [2023-11-06 22:56:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 203 states have (on average 1.2266009852216748) internal successors, (249), 205 states have internal predecessors, (249), 24 states have call successors, (24), 23 states have call predecessors, (24), 23 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-06 22:56:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 296 transitions. [2023-11-06 22:56:31,810 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 296 transitions. Word has length 32 [2023-11-06 22:56:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:31,812 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 296 transitions. [2023-11-06 22:56:31,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 296 transitions. [2023-11-06 22:56:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:56:31,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:31,814 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:31,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 22:56:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:56:32,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:32,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 138996666, now seen corresponding path program 3 times [2023-11-06 22:56:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:32,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728030770] [2023-11-06 22:56:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:32,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:32,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765411433] [2023-11-06 22:56:32,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:56:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:32,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:32,055 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:56:32,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:56:32,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:32,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:56:32,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 22:56:32,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 22:56:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:51,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728030770] [2023-11-06 22:56:51,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:51,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765411433] [2023-11-06 22:56:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765411433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:51,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:51,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 22:56:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995554642] [2023-11-06 22:56:51,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:56:51,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:56:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:56:51,477 INFO L87 Difference]: Start difference. First operand 251 states and 296 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:57,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:56:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:58,528 INFO L93 Difference]: Finished difference Result 429 states and 511 transitions. [2023-11-06 22:56:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:56:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-06 22:56:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:58,532 INFO L225 Difference]: With dead ends: 429 [2023-11-06 22:56:58,532 INFO L226 Difference]: Without dead ends: 425 [2023-11-06 22:56:58,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=67, Invalid=204, Unknown=1, NotChecked=0, Total=272 [2023-11-06 22:56:58,534 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:58,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 157 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-06 22:56:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-06 22:56:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 286. [2023-11-06 22:56:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 226 states have (on average 1.1858407079646018) internal successors, (268), 236 states have internal predecessors, (268), 30 states have call successors, (30), 29 states have call predecessors, (30), 29 states have return successors, (29), 20 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-06 22:56:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 327 transitions. [2023-11-06 22:56:58,614 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 327 transitions. Word has length 32 [2023-11-06 22:56:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:58,615 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 327 transitions. [2023-11-06 22:56:58,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 327 transitions. [2023-11-06 22:56:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:56:58,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:58,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:56:58,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:58,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:56:58,822 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:58,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1289196803, now seen corresponding path program 4 times [2023-11-06 22:56:58,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:58,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392772729] [2023-11-06 22:56:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:58,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:58,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:58,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372363830] [2023-11-06 22:56:58,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:56:58,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:58,834 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:58,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f297f4-6ccb-471f-981c-b59acfb9b68e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:56:59,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:56:59,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:59,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:56:59,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:59,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:44,941 WARN L293 SmtUtils]: Spent 8.95s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:58:18,201 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:58:42,074 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (< .cse0 (* 2 .cse1)) (= .cse2 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse1 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (< (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse1 4294967294)) 4294967296) .cse1) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse2)) (< (* .cse1 4) (+ .cse0 1)))) is different from true [2023-11-06 22:59:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-11-06 22:59:15,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392772729] [2023-11-06 22:59:15,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:59:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372363830] [2023-11-06 22:59:15,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372363830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:15,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:15,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-06 22:59:15,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008112181] [2023-11-06 22:59:15,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:15,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:59:15,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:59:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=4, NotChecked=44, Total=600 [2023-11-06 22:59:15,138 INFO L87 Difference]: Start difference. First operand 286 states and 327 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:00:07,934 WARN L293 SmtUtils]: Spent 44.14s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:00:09,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []