./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-91.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_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/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_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-91.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/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_17865c3a-4317-463e-97df-bd568f92f679/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 98e66c61c01623c41b31710156dd9accf1ba643ca7c07eb5ec3e619f761304a5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:58:28,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:58:28,982 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:58:28,992 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:58:28,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:58:29,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:58:29,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:58:29,039 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:58:29,040 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:58:29,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:58:29,048 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:58:29,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:58:29,049 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:58:29,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:58:29,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:58:29,052 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:58:29,053 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:58:29,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:58:29,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:58:29,054 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:58:29,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:58:29,055 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:58:29,056 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:58:29,056 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:58:29,057 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:58:29,059 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:58:29,060 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:58:29,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:58:29,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:29,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:58:29,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:58:29,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:58:29,064 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:58:29,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:58:29,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:58:29,065 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:58:29,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:58:29,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:58:29,066 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:58:29,066 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_17865c3a-4317-463e-97df-bd568f92f679/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98e66c61c01623c41b31710156dd9accf1ba643ca7c07eb5ec3e619f761304a5 [2023-11-06 21:58:29,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:58:29,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:58:29,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:58:29,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:58:29,435 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:58:29,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-91.i [2023-11-06 21:58:32,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:58:33,099 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:58:33,099 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-91.i [2023-11-06 21:58:33,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/data/7a6650b4a/1226480d9cc14306b0e3638f7b6eb467/FLAG442219fab [2023-11-06 21:58:33,133 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/data/7a6650b4a/1226480d9cc14306b0e3638f7b6eb467 [2023-11-06 21:58:33,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:58:33,138 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:58:33,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:33,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:58:33,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:58:33,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:33,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b494453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33, skipping insertion in model container [2023-11-06 21:58:33,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:33,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:58:33,473 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_17865c3a-4317-463e-97df-bd568f92f679/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-91.i[916,929] [2023-11-06 21:58:33,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:33,751 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:58:33,766 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_17865c3a-4317-463e-97df-bd568f92f679/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-91.i[916,929] [2023-11-06 21:58:33,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:33,885 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:58:33,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33 WrapperNode [2023-11-06 21:58:33,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:33,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:33,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:58:33,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:58:33,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:33,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,062 INFO L138 Inliner]: procedures = 26, calls = 70, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 508 [2023-11-06 21:58:34,063 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:34,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:58:34,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:58:34,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:58:34,077 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,180 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:58:34,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:58:34,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:58:34,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:58:34,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (1/1) ... [2023-11-06 21:58:34,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:34,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:58:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:58:34,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:58:34,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:58:34,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:58:34,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:58:34,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:58:34,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:58:34,515 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:58:34,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:58:35,812 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:58:35,830 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:58:35,830 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:58:35,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:35 BoogieIcfgContainer [2023-11-06 21:58:35,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:58:35,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:58:35,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:58:35,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:58:35,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:33" (1/3) ... [2023-11-06 21:58:35,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a2cc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:35, skipping insertion in model container [2023-11-06 21:58:35,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:33" (2/3) ... [2023-11-06 21:58:35,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a2cc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:35, skipping insertion in model container [2023-11-06 21:58:35,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:35" (3/3) ... [2023-11-06 21:58:35,845 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-91.i [2023-11-06 21:58:35,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:58:35,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:58:35,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:35,992 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;@2f39703c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:35,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:58:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 140 states have (on average 1.5357142857142858) internal successors, (215), 141 states have internal predecessors, (215), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 21:58:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-06 21:58:36,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:36,096 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:36,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:36,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 277433065, now seen corresponding path program 1 times [2023-11-06 21:58:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:36,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691529254] [2023-11-06 21:58:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691529254] [2023-11-06 21:58:36,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:58:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145036364] [2023-11-06 21:58:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:36,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:36,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:36,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:58:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:37,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:58:37,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2023-11-06 21:58:37,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:37,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145036364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:37,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:37,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:37,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90935048] [2023-11-06 21:58:37,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:37,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:58:37,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:58:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:58:37,275 INFO L87 Difference]: Start difference. First operand has 200 states, 140 states have (on average 1.5357142857142858) internal successors, (215), 141 states have internal predecessors, (215), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) Second operand has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 21:58:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:37,350 INFO L93 Difference]: Finished difference Result 392 states and 707 transitions. [2023-11-06 21:58:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:58:37,353 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 2 states have call successors, (57) Word has length 375 [2023-11-06 21:58:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:37,387 INFO L225 Difference]: With dead ends: 392 [2023-11-06 21:58:37,387 INFO L226 Difference]: Without dead ends: 195 [2023-11-06 21:58:37,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 374 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 21:58:37,401 INFO L413 NwaCegarLoop]: 319 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, 319 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 21:58:37,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-06 21:58:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-06 21:58:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 136 states have (on average 1.5073529411764706) internal successors, (205), 136 states have internal predecessors, (205), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 21:58:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 319 transitions. [2023-11-06 21:58:37,487 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 319 transitions. Word has length 375 [2023-11-06 21:58:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:37,488 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 319 transitions. [2023-11-06 21:58:37,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 21:58:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 319 transitions. [2023-11-06 21:58:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-06 21:58:37,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:37,501 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:37,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:58:37,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:37,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash -569035969, now seen corresponding path program 1 times [2023-11-06 21:58:37,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:37,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981535297] [2023-11-06 21:58:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:37,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:37,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:37,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439115729] [2023-11-06 21:58:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:37,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:37,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:58:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:38,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:58:38,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-06 21:58:38,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:38,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981535297] [2023-11-06 21:58:38,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439115729] [2023-11-06 21:58:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439115729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:38,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:38,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:38,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918159081] [2023-11-06 21:58:38,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:38,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:38,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:38,459 INFO L87 Difference]: Start difference. First operand 195 states and 319 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 21:58:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:38,648 INFO L93 Difference]: Finished difference Result 570 states and 933 transitions. [2023-11-06 21:58:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:38,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 375 [2023-11-06 21:58:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:38,657 INFO L225 Difference]: With dead ends: 570 [2023-11-06 21:58:38,657 INFO L226 Difference]: Without dead ends: 378 [2023-11-06 21:58:38,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 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 21:58:38,661 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 288 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:38,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 760 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-06 21:58:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 246. [2023-11-06 21:58:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 187 states have (on average 1.5240641711229947) internal successors, (285), 187 states have internal predecessors, (285), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 21:58:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 399 transitions. [2023-11-06 21:58:38,747 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 399 transitions. Word has length 375 [2023-11-06 21:58:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:38,750 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 399 transitions. [2023-11-06 21:58:38,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 21:58:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 399 transitions. [2023-11-06 21:58:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-06 21:58:38,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:38,759 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:38,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:38,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:38,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:38,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -889375939, now seen corresponding path program 1 times [2023-11-06 21:58:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:38,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334568831] [2023-11-06 21:58:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:38,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:39,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:39,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079410276] [2023-11-06 21:58:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:39,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:39,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:39,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:39,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:58:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:39,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:58:39,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-06 21:58:39,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:39,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:39,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334568831] [2023-11-06 21:58:39,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:39,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079410276] [2023-11-06 21:58:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079410276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:39,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:39,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:39,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295130967] [2023-11-06 21:58:39,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:39,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:39,542 INFO L87 Difference]: Start difference. First operand 246 states and 399 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 21:58:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:39,674 INFO L93 Difference]: Finished difference Result 435 states and 709 transitions. [2023-11-06 21:58:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 375 [2023-11-06 21:58:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:39,685 INFO L225 Difference]: With dead ends: 435 [2023-11-06 21:58:39,685 INFO L226 Difference]: Without dead ends: 192 [2023-11-06 21:58:39,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 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 21:58:39,691 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 284 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:39,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 280 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-06 21:58:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2023-11-06 21:58:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 133 states have (on average 1.3984962406015038) internal successors, (186), 133 states have internal predecessors, (186), 57 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-06 21:58:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 300 transitions. [2023-11-06 21:58:39,744 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 300 transitions. Word has length 375 [2023-11-06 21:58:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:39,747 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 300 transitions. [2023-11-06 21:58:39,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 21:58:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 300 transitions. [2023-11-06 21:58:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-06 21:58:39,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:39,756 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:39,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:39,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:39,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:39,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash 358692288, now seen corresponding path program 1 times [2023-11-06 21:58:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490791989] [2023-11-06 21:58:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:40,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:40,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114303207] [2023-11-06 21:58:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:40,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:40,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:40,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:58:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:40,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:58:40,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2264 proven. 15 refuted. 0 times theorem prover too weak. 4105 trivial. 0 not checked. [2023-11-06 21:58:41,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 153 proven. 15 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-06 21:58:42,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:42,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490791989] [2023-11-06 21:58:42,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:42,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114303207] [2023-11-06 21:58:42,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114303207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:42,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:42,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-06 21:58:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631513077] [2023-11-06 21:58:42,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:58:42,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:58:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:58:42,328 INFO L87 Difference]: Start difference. First operand 192 states and 300 transitions. Second operand has 17 states, 16 states have (on average 10.0) internal successors, (160), 17 states have internal predecessors, (160), 6 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 5 states have call predecessors, (108), 6 states have call successors, (108) [2023-11-06 21:58:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:45,647 INFO L93 Difference]: Finished difference Result 639 states and 997 transitions. [2023-11-06 21:58:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:58:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 10.0) internal successors, (160), 17 states have internal predecessors, (160), 6 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 5 states have call predecessors, (108), 6 states have call successors, (108) Word has length 376 [2023-11-06 21:58:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:45,658 INFO L225 Difference]: With dead ends: 639 [2023-11-06 21:58:45,659 INFO L226 Difference]: Without dead ends: 450 [2023-11-06 21:58:45,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:58:45,667 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 1198 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:45,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 2026 Invalid, 2773 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [786 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-06 21:58:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-06 21:58:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 353. [2023-11-06 21:58:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 241 states have (on average 1.3941908713692945) internal successors, (336), 242 states have internal predecessors, (336), 108 states have call successors, (108), 3 states have call predecessors, (108), 3 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-06 21:58:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 552 transitions. [2023-11-06 21:58:45,765 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 552 transitions. Word has length 376 [2023-11-06 21:58:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:45,771 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 552 transitions. [2023-11-06 21:58:45,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 10.0) internal successors, (160), 17 states have internal predecessors, (160), 6 states have call successors, (108), 3 states have call predecessors, (108), 5 states have return successors, (108), 5 states have call predecessors, (108), 6 states have call successors, (108) [2023-11-06 21:58:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 552 transitions. [2023-11-06 21:58:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-06 21:58:45,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:45,782 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:45,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:45,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:45,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1018223810, now seen corresponding path program 1 times [2023-11-06 21:58:45,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:45,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394076008] [2023-11-06 21:58:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:45,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:46,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:46,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911587874] [2023-11-06 21:58:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:46,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:46,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:58:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:46,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:58:46,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3572 proven. 15 refuted. 0 times theorem prover too weak. 2797 trivial. 0 not checked. [2023-11-06 21:58:47,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 153 proven. 15 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-06 21:58:48,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394076008] [2023-11-06 21:58:48,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:48,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911587874] [2023-11-06 21:58:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911587874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:48,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:48,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 21:58:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487243868] [2023-11-06 21:58:48,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:48,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:58:48,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:58:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:58:48,122 INFO L87 Difference]: Start difference. First operand 353 states and 552 transitions. Second operand has 15 states, 14 states have (on average 11.0) internal successors, (154), 15 states have internal predecessors, (154), 6 states have call successors, (96), 3 states have call predecessors, (96), 5 states have return successors, (96), 5 states have call predecessors, (96), 6 states have call successors, (96) [2023-11-06 21:58:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:50,825 INFO L93 Difference]: Finished difference Result 1117 states and 1749 transitions. [2023-11-06 21:58:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:58:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 11.0) internal successors, (154), 15 states have internal predecessors, (154), 6 states have call successors, (96), 3 states have call predecessors, (96), 5 states have return successors, (96), 5 states have call predecessors, (96), 6 states have call successors, (96) Word has length 376 [2023-11-06 21:58:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:50,837 INFO L225 Difference]: With dead ends: 1117 [2023-11-06 21:58:50,837 INFO L226 Difference]: Without dead ends: 767 [2023-11-06 21:58:50,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:58:50,840 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1838 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:50,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1889 Valid, 1248 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [883 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 21:58:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-11-06 21:58:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 354. [2023-11-06 21:58:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 242 states have (on average 1.396694214876033) internal successors, (338), 243 states have internal predecessors, (338), 108 states have call successors, (108), 3 states have call predecessors, (108), 3 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-06 21:58:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 554 transitions. [2023-11-06 21:58:50,938 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 554 transitions. Word has length 376 [2023-11-06 21:58:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:50,939 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 554 transitions. [2023-11-06 21:58:50,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 11.0) internal successors, (154), 15 states have internal predecessors, (154), 6 states have call successors, (96), 3 states have call predecessors, (96), 5 states have return successors, (96), 5 states have call predecessors, (96), 6 states have call successors, (96) [2023-11-06 21:58:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 554 transitions. [2023-11-06 21:58:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:58:50,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:50,946 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:50,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:51,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:51,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:51,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:51,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1251609679, now seen corresponding path program 1 times [2023-11-06 21:58:51,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:51,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114861768] [2023-11-06 21:58:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:51,245 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:51,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284012390] [2023-11-06 21:58:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:51,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:51,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:58:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:51,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:58:51,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2963 proven. 108 refuted. 0 times theorem prover too weak. 3313 trivial. 0 not checked. [2023-11-06 21:58:53,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 111 proven. 57 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-06 21:58:55,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:55,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114861768] [2023-11-06 21:58:55,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284012390] [2023-11-06 21:58:55,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284012390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:55,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-11-06 21:58:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607007674] [2023-11-06 21:58:55,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:58:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:58:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:58:55,109 INFO L87 Difference]: Start difference. First operand 354 states and 554 transitions. Second operand has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 16 states have internal predecessors, (135), 4 states have call successors, (76), 3 states have call predecessors, (76), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-06 21:58:59,287 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 21:59:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:00,981 INFO L93 Difference]: Finished difference Result 1388 states and 2141 transitions. [2023-11-06 21:59:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:59:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 16 states have internal predecessors, (135), 4 states have call successors, (76), 3 states have call predecessors, (76), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 377 [2023-11-06 21:59:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:00,995 INFO L225 Difference]: With dead ends: 1388 [2023-11-06 21:59:00,996 INFO L226 Difference]: Without dead ends: 1037 [2023-11-06 21:59:00,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 739 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 21:59:01,000 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1307 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 575 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:01,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 2099 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 1330 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-11-06 21:59:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-11-06 21:59:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 761. [2023-11-06 21:59:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 569 states have (on average 1.4463971880492092) internal successors, (823), 572 states have internal predecessors, (823), 182 states have call successors, (182), 9 states have call predecessors, (182), 9 states have return successors, (182), 179 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-06 21:59:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1187 transitions. [2023-11-06 21:59:01,268 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1187 transitions. Word has length 377 [2023-11-06 21:59:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:01,271 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 1187 transitions. [2023-11-06 21:59:01,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 16 states have internal predecessors, (135), 4 states have call successors, (76), 3 states have call predecessors, (76), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-06 21:59:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1187 transitions. [2023-11-06 21:59:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:59:01,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:01,277 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:01,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 21:59:01,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:59:01,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:01,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -797778163, now seen corresponding path program 1 times [2023-11-06 21:59:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:01,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496832016] [2023-11-06 21:59:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:01,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:01,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503701633] [2023-11-06 21:59:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:01,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:01,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:01,581 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:01,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:59:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:02,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:59:02,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2808 proven. 0 refuted. 0 times theorem prover too weak. 3576 trivial. 0 not checked. [2023-11-06 21:59:03,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:03,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496832016] [2023-11-06 21:59:03,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:03,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503701633] [2023-11-06 21:59:03,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503701633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:03,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:03,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:03,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919552628] [2023-11-06 21:59:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:59:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:59:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:03,806 INFO L87 Difference]: Start difference. First operand 761 states and 1187 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 21:59:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:04,654 INFO L93 Difference]: Finished difference Result 2275 states and 3551 transitions. [2023-11-06 21:59:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:04,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 377 [2023-11-06 21:59:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:04,671 INFO L225 Difference]: With dead ends: 2275 [2023-11-06 21:59:04,671 INFO L226 Difference]: Without dead ends: 1517 [2023-11-06 21:59:04,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:04,677 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 174 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:04,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 814 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:59:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2023-11-06 21:59:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1513. [2023-11-06 21:59:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1130 states have (on average 1.4389380530973452) internal successors, (1626), 1136 states have internal predecessors, (1626), 364 states have call successors, (364), 18 states have call predecessors, (364), 18 states have return successors, (364), 358 states have call predecessors, (364), 364 states have call successors, (364) [2023-11-06 21:59:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2354 transitions. [2023-11-06 21:59:05,194 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2354 transitions. Word has length 377 [2023-11-06 21:59:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:05,195 INFO L495 AbstractCegarLoop]: Abstraction has 1513 states and 2354 transitions. [2023-11-06 21:59:05,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 21:59:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2354 transitions. [2023-11-06 21:59:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:59:05,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:05,202 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:05,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:59:05,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:05,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash 941455878, now seen corresponding path program 1 times [2023-11-06 21:59:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378120123] [2023-11-06 21:59:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:05,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:05,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527738758] [2023-11-06 21:59:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:05,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:05,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:05,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:59:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:05,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:59:05,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2828 proven. 114 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2023-11-06 21:59:06,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 54 proven. 114 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-06 21:59:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:06,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378120123] [2023-11-06 21:59:06,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:06,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527738758] [2023-11-06 21:59:06,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527738758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:06,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:06,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 21:59:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422859287] [2023-11-06 21:59:06,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:59:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:59:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:59:06,771 INFO L87 Difference]: Start difference. First operand 1513 states and 2354 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 3 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 3 states have call predecessors, (96), 3 states have call successors, (96) [2023-11-06 21:59:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:07,569 INFO L93 Difference]: Finished difference Result 2808 states and 4331 transitions. [2023-11-06 21:59:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:59:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 3 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 3 states have call predecessors, (96), 3 states have call successors, (96) Word has length 377 [2023-11-06 21:59:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:07,582 INFO L225 Difference]: With dead ends: 2808 [2023-11-06 21:59:07,582 INFO L226 Difference]: Without dead ends: 1298 [2023-11-06 21:59:07,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:59:07,589 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 440 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:07,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 560 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:59:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2023-11-06 21:59:07,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1282. [2023-11-06 21:59:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 929 states have (on average 1.3961248654467169) internal successors, (1297), 934 states have internal predecessors, (1297), 327 states have call successors, (327), 25 states have call predecessors, (327), 25 states have return successors, (327), 322 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-06 21:59:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1951 transitions. [2023-11-06 21:59:07,925 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1951 transitions. Word has length 377 [2023-11-06 21:59:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:07,926 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1951 transitions. [2023-11-06 21:59:07,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 3 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 3 states have call predecessors, (96), 3 states have call successors, (96) [2023-11-06 21:59:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1951 transitions. [2023-11-06 21:59:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:59:07,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:07,932 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:07,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:08,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:59:08,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:08,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash -747434942, now seen corresponding path program 1 times [2023-11-06 21:59:08,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:08,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178550785] [2023-11-06 21:59:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:08,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:08,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739417924] [2023-11-06 21:59:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:08,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:08,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:08,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:59:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:08,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:59:08,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3572 proven. 126 refuted. 0 times theorem prover too weak. 2686 trivial. 0 not checked. [2023-11-06 21:59:10,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:16,576 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~var_1_15~0 Int) (~var_1_14~0 Int)) (let ((.cse0 (div ~var_1_14~0 ~var_1_15~0))) (or (< 254 .cse0) (< 0 (+ ~var_1_15~0 1)) (not (= (mod ~var_1_14~0 ~var_1_15~0) 0)) (not (= c_~var_1_10~0 .cse0))))) (forall ((~var_1_15~0 Int) (~var_1_14~0 Int)) (let ((.cse1 (div ~var_1_14~0 ~var_1_15~0))) (or (< 254 .cse1) (< ~var_1_15~0 0) (not (= c_~var_1_10~0 .cse1)) (< ~var_1_14~0 0)))) (forall ((~var_1_15~0 Int) (~var_1_14~0 Int)) (let ((.cse2 (div ~var_1_14~0 ~var_1_15~0))) (or (< 0 (+ ~var_1_15~0 1)) (not (= (+ c_~var_1_10~0 1) .cse2)) (= (mod ~var_1_14~0 ~var_1_15~0) 0) (< 255 .cse2) (< 0 (+ ~var_1_14~0 1))))) (forall ((~var_1_15~0 Int) (~var_1_14~0 Int)) (let ((.cse3 (div ~var_1_14~0 ~var_1_15~0))) (or (< 254 .cse3) (not (= (mod ~var_1_14~0 ~var_1_15~0) 0)) (< ~var_1_15~0 0) (not (= c_~var_1_10~0 .cse3))))) (forall ((~var_1_15~0 Int) (~var_1_14~0 Int)) (or (< 0 (+ ~var_1_15~0 1)) (not (= c_~var_1_10~0 (div ~var_1_14~0 ~var_1_15~0))) (< ~var_1_14~0 0))) (not (= c_~var_1_10~0 0)) (forall ((~var_1_15~0 Int) (~var_1_14~0 Int)) (let ((.cse4 (div ~var_1_14~0 ~var_1_15~0))) (or (not (= c_~var_1_10~0 (+ .cse4 1))) (= (mod ~var_1_14~0 ~var_1_15~0) 0) (< ~var_1_15~0 0) (< 0 (+ ~var_1_14~0 1)) (< 253 .cse4))))) is different from false [2023-11-06 21:59:28,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178550785] [2023-11-06 21:59:28,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739417924] [2023-11-06 21:59:28,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739417924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:28,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:59:28,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-06 21:59:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790268535] [2023-11-06 21:59:28,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:28,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:59:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:59:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=326, Unknown=3, NotChecked=36, Total=420 [2023-11-06 21:59:28,520 INFO L87 Difference]: Start difference. First operand 1282 states and 1951 transitions. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 3 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2023-11-06 21:59:33,795 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 [0] [2023-11-06 21:59:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:37,178 INFO L93 Difference]: Finished difference Result 3717 states and 5654 transitions. [2023-11-06 21:59:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:59:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 3 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 377 [2023-11-06 21:59:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:37,198 INFO L225 Difference]: With dead ends: 3717 [2023-11-06 21:59:37,199 INFO L226 Difference]: Without dead ends: 2541 [2023-11-06 21:59:37,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=272, Invalid=1135, Unknown=3, NotChecked=72, Total=1482 [2023-11-06 21:59:37,205 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 982 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:37,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1649 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1203 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2023-11-06 21:59:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2023-11-06 21:59:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1826. [2023-11-06 21:59:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1508 states have (on average 1.4827586206896552) internal successors, (2236), 1517 states have internal predecessors, (2236), 287 states have call successors, (287), 30 states have call predecessors, (287), 30 states have return successors, (287), 278 states have call predecessors, (287), 287 states have call successors, (287) [2023-11-06 21:59:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2810 transitions. [2023-11-06 21:59:37,521 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2810 transitions. Word has length 377 [2023-11-06 21:59:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:37,522 INFO L495 AbstractCegarLoop]: Abstraction has 1826 states and 2810 transitions. [2023-11-06 21:59:37,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 3 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2023-11-06 21:59:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2810 transitions. [2023-11-06 21:59:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:59:37,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:37,530 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:37,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:37,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:37,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1256908032, now seen corresponding path program 1 times [2023-11-06 21:59:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030930799] [2023-11-06 21:59:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:37,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:37,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46443949] [2023-11-06 21:59:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:37,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:37,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:37,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:59:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:38,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:59:38,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3866 proven. 126 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2023-11-06 21:59:39,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 204 proven. 129 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2023-11-06 21:59:40,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:40,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030930799] [2023-11-06 21:59:40,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:40,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46443949] [2023-11-06 21:59:40,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46443949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:40,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-11-06 21:59:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937802038] [2023-11-06 21:59:40,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:40,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 21:59:40,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 21:59:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:59:40,518 INFO L87 Difference]: Start difference. First operand 1826 states and 2810 transitions. Second operand has 23 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 23 states have internal predecessors, (171), 8 states have call successors, (108), 4 states have call predecessors, (108), 8 states have return successors, (108), 7 states have call predecessors, (108), 8 states have call successors, (108) [2023-11-06 21:59:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:44,685 INFO L93 Difference]: Finished difference Result 3895 states and 5940 transitions. [2023-11-06 21:59:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 21:59:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 23 states have internal predecessors, (171), 8 states have call successors, (108), 4 states have call predecessors, (108), 8 states have return successors, (108), 7 states have call predecessors, (108), 8 states have call successors, (108) Word has length 377 [2023-11-06 21:59:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:44,704 INFO L225 Difference]: With dead ends: 3895 [2023-11-06 21:59:44,704 INFO L226 Difference]: Without dead ends: 2179 [2023-11-06 21:59:44,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 21:59:44,711 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1183 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:44,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 1767 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 21:59:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2023-11-06 21:59:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1686. [2023-11-06 21:59:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1323 states have (on average 1.4414210128495843) internal successors, (1907), 1331 states have internal predecessors, (1907), 329 states have call successors, (329), 33 states have call predecessors, (329), 33 states have return successors, (329), 321 states have call predecessors, (329), 329 states have call successors, (329) [2023-11-06 21:59:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2565 transitions. [2023-11-06 21:59:45,104 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2565 transitions. Word has length 377 [2023-11-06 21:59:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:45,105 INFO L495 AbstractCegarLoop]: Abstraction has 1686 states and 2565 transitions. [2023-11-06 21:59:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 23 states have internal predecessors, (171), 8 states have call successors, (108), 4 states have call predecessors, (108), 8 states have return successors, (108), 7 states have call predecessors, (108), 8 states have call successors, (108) [2023-11-06 21:59:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2565 transitions. [2023-11-06 21:59:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:59:45,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:45,112 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:45,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:45,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:45,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash -87903420, now seen corresponding path program 1 times [2023-11-06 21:59:45,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:45,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310488644] [2023-11-06 21:59:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:45,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:45,386 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:45,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87678855] [2023-11-06 21:59:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:45,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:45,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:59:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:45,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:59:45,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 1185 proven. 24 refuted. 0 times theorem prover too weak. 5175 trivial. 0 not checked. [2023-11-06 21:59:46,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 306 proven. 27 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2023-11-06 21:59:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310488644] [2023-11-06 21:59:47,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87678855] [2023-11-06 21:59:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87678855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:47,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:47,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2023-11-06 21:59:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720722691] [2023-11-06 21:59:47,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:47,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:59:47,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:59:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:59:47,729 INFO L87 Difference]: Start difference. First operand 1686 states and 2565 transitions. Second operand has 19 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 7 states have call successors, (114), 4 states have call predecessors, (114), 7 states have return successors, (114), 6 states have call predecessors, (114), 7 states have call successors, (114) [2023-11-06 21:59:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:52,820 INFO L93 Difference]: Finished difference Result 4586 states and 7024 transitions. [2023-11-06 21:59:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:59:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 7 states have call successors, (114), 4 states have call predecessors, (114), 7 states have return successors, (114), 6 states have call predecessors, (114), 7 states have call successors, (114) Word has length 377 [2023-11-06 21:59:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:52,844 INFO L225 Difference]: With dead ends: 4586 [2023-11-06 21:59:52,844 INFO L226 Difference]: Without dead ends: 3010 [2023-11-06 21:59:52,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 736 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:59:52,850 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 1067 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:52,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 2066 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 21:59:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2023-11-06 21:59:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1685. [2023-11-06 21:59:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1321 states have (on average 1.4352763058289175) internal successors, (1896), 1329 states have internal predecessors, (1896), 329 states have call successors, (329), 34 states have call predecessors, (329), 34 states have return successors, (329), 321 states have call predecessors, (329), 329 states have call successors, (329) [2023-11-06 21:59:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2554 transitions. [2023-11-06 21:59:53,239 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2554 transitions. Word has length 377 [2023-11-06 21:59:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:53,240 INFO L495 AbstractCegarLoop]: Abstraction has 1685 states and 2554 transitions. [2023-11-06 21:59:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 7 states have call successors, (114), 4 states have call predecessors, (114), 7 states have return successors, (114), 6 states have call predecessors, (114), 7 states have call successors, (114) [2023-11-06 21:59:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2554 transitions. [2023-11-06 21:59:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-11-06 21:59:53,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:53,248 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:53,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:53,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:53,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:53,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1321403917, now seen corresponding path program 1 times [2023-11-06 21:59:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775244426] [2023-11-06 21:59:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:53,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:53,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857351305] [2023-11-06 21:59:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:53,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:53,526 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:53,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:59:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:54,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:59:54,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2987 proven. 264 refuted. 0 times theorem prover too weak. 3133 trivial. 0 not checked. [2023-11-06 21:59:57,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775244426] [2023-11-06 22:00:45,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:45,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857351305] [2023-11-06 22:00:45,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857351305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:45,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:00:45,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-06 22:00:45,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336991427] [2023-11-06 22:00:45,193 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:45,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:00:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:00:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=288, Unknown=1, NotChecked=0, Total=342 [2023-11-06 22:00:45,196 INFO L87 Difference]: Start difference. First operand 1685 states and 2554 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 12 states have internal predecessors, (108), 3 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2023-11-06 22:00:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:52,546 INFO L93 Difference]: Finished difference Result 3338 states and 5035 transitions. [2023-11-06 22:00:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:00:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 12 states have internal predecessors, (108), 3 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 378 [2023-11-06 22:00:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:52,561 INFO L225 Difference]: With dead ends: 3338 [2023-11-06 22:00:52,562 INFO L226 Difference]: Without dead ends: 1763 [2023-11-06 22:00:52,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=192, Invalid=737, Unknown=1, NotChecked=0, Total=930 [2023-11-06 22:00:52,568 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 366 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:52,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1965 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-06 22:00:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2023-11-06 22:00:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1600. [2023-11-06 22:00:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1265 states have (on average 1.434782608695652) internal successors, (1815), 1272 states have internal predecessors, (1815), 297 states have call successors, (297), 37 states have call predecessors, (297), 37 states have return successors, (297), 290 states have call predecessors, (297), 297 states have call successors, (297) [2023-11-06 22:00:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2409 transitions. [2023-11-06 22:00:52,981 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2409 transitions. Word has length 378 [2023-11-06 22:00:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:52,982 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 2409 transitions. [2023-11-06 22:00:52,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 12 states have internal predecessors, (108), 3 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2023-11-06 22:00:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2409 transitions. [2023-11-06 22:00:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-11-06 22:00:52,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:52,990 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:53,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:53,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:53,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash 811930827, now seen corresponding path program 1 times [2023-11-06 22:00:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721787211] [2023-11-06 22:00:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:53,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:53,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:53,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721872463] [2023-11-06 22:00:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:53,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:53,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:53,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:00:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:53,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:00:53,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3122 proven. 114 refuted. 0 times theorem prover too weak. 3148 trivial. 0 not checked. [2023-11-06 22:00:55,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 54 proven. 114 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-06 22:00:56,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:56,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721787211] [2023-11-06 22:00:56,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:56,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721872463] [2023-11-06 22:00:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721872463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:56,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:56,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2023-11-06 22:00:56,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238346527] [2023-11-06 22:00:56,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:56,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:00:56,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:00:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:00:56,893 INFO L87 Difference]: Start difference. First operand 1600 states and 2409 transitions. Second operand has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 6 states have call successors, (114), 4 states have call predecessors, (114), 6 states have return successors, (114), 6 states have call predecessors, (114), 6 states have call successors, (114) [2023-11-06 22:01:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:00,420 INFO L93 Difference]: Finished difference Result 3424 states and 5178 transitions. [2023-11-06 22:01:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:01:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 6 states have call successors, (114), 4 states have call predecessors, (114), 6 states have return successors, (114), 6 states have call predecessors, (114), 6 states have call successors, (114) Word has length 378 [2023-11-06 22:01:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:00,462 INFO L225 Difference]: With dead ends: 3424 [2023-11-06 22:01:00,463 INFO L226 Difference]: Without dead ends: 1942 [2023-11-06 22:01:00,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 741 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:01:00,469 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 706 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:00,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1456 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 22:01:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2023-11-06 22:01:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1444. [2023-11-06 22:01:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1114 states have (on average 1.417414721723519) internal successors, (1579), 1120 states have internal predecessors, (1579), 293 states have call successors, (293), 36 states have call predecessors, (293), 36 states have return successors, (293), 287 states have call predecessors, (293), 293 states have call successors, (293) [2023-11-06 22:01:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2165 transitions. [2023-11-06 22:01:00,900 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2165 transitions. Word has length 378 [2023-11-06 22:01:00,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:00,901 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 2165 transitions. [2023-11-06 22:01:00,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 6 states have call successors, (114), 4 states have call predecessors, (114), 6 states have return successors, (114), 6 states have call predecessors, (114), 6 states have call successors, (114) [2023-11-06 22:01:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2165 transitions. [2023-11-06 22:01:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-11-06 22:01:00,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:00,907 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:00,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:01,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:01,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:01,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 292044619, now seen corresponding path program 1 times [2023-11-06 22:01:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:01,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290938061] [2023-11-06 22:01:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:01,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:01,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:01,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594889610] [2023-11-06 22:01:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:01,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:01,203 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:01,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:01:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:01,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:01:01,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 4311 proven. 225 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2023-11-06 22:01:05,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-06 22:01:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:14,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290938061] [2023-11-06 22:01:14,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:14,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594889610] [2023-11-06 22:01:14,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594889610] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:14,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:14,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 32 [2023-11-06 22:01:14,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411289937] [2023-11-06 22:01:14,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:14,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:01:14,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:01:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:01:14,336 INFO L87 Difference]: Start difference. First operand 1444 states and 2165 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 2 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 22:01:16,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:01:24,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:01:56,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:01:58,352 WARN L539 Checker$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 22:02:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:01,412 INFO L93 Difference]: Finished difference Result 5357 states and 8141 transitions. [2023-11-06 22:02:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:02:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 2 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 378 [2023-11-06 22:02:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:01,449 INFO L225 Difference]: With dead ends: 5357 [2023-11-06 22:02:01,449 INFO L226 Difference]: Without dead ends: 4031 [2023-11-06 22:02:01,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 22:02:01,459 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 1810 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 234 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:01,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1810 Valid, 3329 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1769 Invalid, 2 Unknown, 0 Unchecked, 36.9s Time] [2023-11-06 22:02:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2023-11-06 22:02:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 1864. [2023-11-06 22:02:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1509 states have (on average 1.440026507620941) internal successors, (2173), 1518 states have internal predecessors, (2173), 307 states have call successors, (307), 47 states have call predecessors, (307), 47 states have return successors, (307), 298 states have call predecessors, (307), 307 states have call successors, (307) [2023-11-06 22:02:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2787 transitions. [2023-11-06 22:02:02,052 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2787 transitions. Word has length 378 [2023-11-06 22:02:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:02,053 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 2787 transitions. [2023-11-06 22:02:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 2 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2023-11-06 22:02:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2787 transitions. [2023-11-06 22:02:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-11-06 22:02:02,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:02,060 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:02,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:02,271 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:02,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash 714746445, now seen corresponding path program 1 times [2023-11-06 22:02:02,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:02,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435494781] [2023-11-06 22:02:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:02,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:02,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846443254] [2023-11-06 22:02:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:02,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:02,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:02:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:03,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:02:03,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3433 proven. 360 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2023-11-06 22:02:07,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-06 22:02:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:09,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435494781] [2023-11-06 22:02:09,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:09,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846443254] [2023-11-06 22:02:09,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846443254] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:09,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:02:09,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 26 [2023-11-06 22:02:09,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375434935] [2023-11-06 22:02:09,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:09,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:02:09,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:09,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:02:09,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:02:09,487 INFO L87 Difference]: Start difference. First operand 1864 states and 2787 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 22:02:14,447 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 22:02:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:16,181 INFO L93 Difference]: Finished difference Result 4213 states and 6321 transitions. [2023-11-06 22:02:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:02:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 378 [2023-11-06 22:02:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:16,203 INFO L225 Difference]: With dead ends: 4213 [2023-11-06 22:02:16,203 INFO L226 Difference]: Without dead ends: 2673 [2023-11-06 22:02:16,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:02:16,209 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1527 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:16,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 1586 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 366 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-11-06 22:02:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-11-06 22:02:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 1806. [2023-11-06 22:02:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1459 states have (on average 1.4386566141192598) internal successors, (2099), 1464 states have internal predecessors, (2099), 299 states have call successors, (299), 47 states have call predecessors, (299), 47 states have return successors, (299), 294 states have call predecessors, (299), 299 states have call successors, (299) [2023-11-06 22:02:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2697 transitions. [2023-11-06 22:02:16,643 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2697 transitions. Word has length 378 [2023-11-06 22:02:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:16,644 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2697 transitions. [2023-11-06 22:02:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 22:02:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2697 transitions. [2023-11-06 22:02:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-11-06 22:02:16,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:16,651 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:16,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:02:16,862 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:16,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1513393715, now seen corresponding path program 1 times [2023-11-06 22:02:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956591696] [2023-11-06 22:02:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:16,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377582416] [2023-11-06 22:02:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:16,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:16,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:16,939 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:16,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17865c3a-4317-463e-97df-bd568f92f679/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:02:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:17,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:02:17,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6384 trivial. 0 not checked. [2023-11-06 22:02:18,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:18,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:18,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956591696] [2023-11-06 22:02:18,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:18,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377582416] [2023-11-06 22:02:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377582416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:18,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838830249] [2023-11-06 22:02:18,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:18,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:18,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:02:18,108 INFO L87 Difference]: Start difference. First operand 1806 states and 2697 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2023-11-06 22:02:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:19,116 INFO L93 Difference]: Finished difference Result 4698 states and 7018 transitions. [2023-11-06 22:02:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (57), 1 states have call predecessors, (57), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 378 [2023-11-06 22:02:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:19,135 INFO L225 Difference]: With dead ends: 4698 [2023-11-06 22:02:19,135 INFO L226 Difference]: Without dead ends: 3128 [2023-11-06 22:02:19,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:02:19,141 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 104 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:19,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 843 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:02:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states.