./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-26.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-26.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c89190f71494cfa64250ca9ffdf4d785818c50a201306d43ec124de4003d1620 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:11:51,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:11:51,915 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:11:51,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:11:51,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:11:51,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:11:51,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:11:51,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:11:51,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:11:51,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:11:51,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:11:51,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:11:51,953 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:11:51,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:11:51,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:11:51,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:11:51,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:11:51,957 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:11:51,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:11:51,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:11:51,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:11:51,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:11:51,960 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:11:51,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:11:51,962 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:11:51,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:11:51,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:11:51,964 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:11:51,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:51,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:11:51,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:11:51,966 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:11:51,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:11:51,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:11:51,967 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:11:51,968 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:11:51,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:11:51,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:11:51,969 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:11:51,970 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_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c89190f71494cfa64250ca9ffdf4d785818c50a201306d43ec124de4003d1620 [2023-11-12 02:11:52,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:11:52,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:11:52,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:11:52,328 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:11:52,329 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:11:52,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-26.i [2023-11-12 02:11:55,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:11:55,871 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:11:55,872 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-26.i [2023-11-12 02:11:55,888 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/data/8cadf00eb/f9c3c7fc88104f749bc920e90d168f87/FLAG76ceef313 [2023-11-12 02:11:55,903 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/data/8cadf00eb/f9c3c7fc88104f749bc920e90d168f87 [2023-11-12 02:11:55,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:11:55,908 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:11:55,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:55,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:11:55,915 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:11:55,916 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:55" (1/1) ... [2023-11-12 02:11:55,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bdc149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:55, skipping insertion in model container [2023-11-12 02:11:55,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:55" (1/1) ... [2023-11-12 02:11:55,975 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:11:56,139 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_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-26.i[916,929] [2023-11-12 02:11:56,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:56,394 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:11:56,411 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_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-26.i[916,929] [2023-11-12 02:11:56,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:56,565 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:11:56,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56 WrapperNode [2023-11-12 02:11:56,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:56,567 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:56,568 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:11:56,568 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:11:56,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,705 INFO L138 Inliner]: procedures = 26, calls = 72, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 520 [2023-11-12 02:11:56,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:56,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:11:56,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:11:56,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:11:56,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,786 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,875 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,882 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:11:56,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:11:56,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:11:56,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:11:56,917 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (1/1) ... [2023-11-12 02:11:56,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:56,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:56,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:11:57,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:11:57,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:11:57,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:11:57,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:11:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:11:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:11:57,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:11:57,202 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:11:57,205 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:11:58,353 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:11:58,367 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:11:58,367 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:11:58,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:58 BoogieIcfgContainer [2023-11-12 02:11:58,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:11:58,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:11:58,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:11:58,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:11:58,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:11:55" (1/3) ... [2023-11-12 02:11:58,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18206c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:58, skipping insertion in model container [2023-11-12 02:11:58,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:56" (2/3) ... [2023-11-12 02:11:58,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18206c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:58, skipping insertion in model container [2023-11-12 02:11:58,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:58" (3/3) ... [2023-11-12 02:11:58,386 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-26.i [2023-11-12 02:11:58,407 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:11:58,407 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:11:58,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:11:58,482 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cd9065d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:11:58,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:11:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 149 states have (on average 1.516778523489933) internal successors, (226), 150 states have internal predecessors, (226), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-12 02:11:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-11-12 02:11:58,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:58,521 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:58,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:58,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1458962658, now seen corresponding path program 1 times [2023-11-12 02:11:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675232063] [2023-11-12 02:11:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675232063] [2023-11-12 02:11:59,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:11:59,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011092986] [2023-11-12 02:11:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:59,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:59,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:11:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:59,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:11:59,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2023-11-12 02:11:59,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011092986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:59,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:59,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:59,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418289359] [2023-11-12 02:11:59,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:11:59,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:11:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:11:59,711 INFO L87 Difference]: Start difference. First operand has 211 states, 149 states have (on average 1.516778523489933) internal successors, (226), 150 states have internal predecessors, (226), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-12 02:11:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:59,771 INFO L93 Difference]: Finished difference Result 415 states and 741 transitions. [2023-11-12 02:11:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:11:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 2 states have call successors, (59) Word has length 392 [2023-11-12 02:11:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:59,785 INFO L225 Difference]: With dead ends: 415 [2023-11-12 02:11:59,786 INFO L226 Difference]: Without dead ends: 207 [2023-11-12 02:11:59,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:11:59,796 INFO L413 NwaCegarLoop]: 337 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, 337 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:59,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-12 02:11:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-12 02:11:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 146 states have (on average 1.5) internal successors, (219), 146 states have internal predecessors, (219), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-12 02:11:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 337 transitions. [2023-11-12 02:11:59,889 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 337 transitions. Word has length 392 [2023-11-12 02:11:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:59,890 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 337 transitions. [2023-11-12 02:11:59,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-12 02:11:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 337 transitions. [2023-11-12 02:11:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-11-12 02:11:59,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:59,903 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:59,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:00,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:12:00,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:00,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1428481780, now seen corresponding path program 1 times [2023-11-12 02:12:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455146616] [2023-11-12 02:12:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:00,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:00,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:00,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331689730] [2023-11-12 02:12:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:00,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:00,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:00,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:12:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:00,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:12:00,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-12 02:12:00,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455146616] [2023-11-12 02:12:00,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331689730] [2023-11-12 02:12:00,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331689730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:00,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:00,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:12:00,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800863005] [2023-11-12 02:12:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:00,829 INFO L87 Difference]: Start difference. First operand 207 states and 337 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:00,982 INFO L93 Difference]: Finished difference Result 486 states and 794 transitions. [2023-11-12 02:12:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 392 [2023-11-12 02:12:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:00,990 INFO L225 Difference]: With dead ends: 486 [2023-11-12 02:12:00,990 INFO L226 Difference]: Without dead ends: 282 [2023-11-12 02:12:00,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:00,993 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 118 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:00,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 635 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:12:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-12 02:12:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 249. [2023-11-12 02:12:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 188 states have (on average 1.5585106382978724) internal successors, (293), 188 states have internal predecessors, (293), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-12 02:12:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 411 transitions. [2023-11-12 02:12:01,030 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 411 transitions. Word has length 392 [2023-11-12 02:12:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:01,034 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 411 transitions. [2023-11-12 02:12:01,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 411 transitions. [2023-11-12 02:12:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-12 02:12:01,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:01,040 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:01,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:01,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:01,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1586677153, now seen corresponding path program 1 times [2023-11-12 02:12:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889240901] [2023-11-12 02:12:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:01,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:01,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524658150] [2023-11-12 02:12:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:01,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:01,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:12:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:12:01,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-12 02:12:01,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:01,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:01,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889240901] [2023-11-12 02:12:01,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:01,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524658150] [2023-11-12 02:12:01,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524658150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:01,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:01,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:12:01,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938782053] [2023-11-12 02:12:01,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:01,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:01,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:01,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:01,828 INFO L87 Difference]: Start difference. First operand 249 states and 411 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:01,917 INFO L93 Difference]: Finished difference Result 497 states and 823 transitions. [2023-11-12 02:12:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 393 [2023-11-12 02:12:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:01,924 INFO L225 Difference]: With dead ends: 497 [2023-11-12 02:12:01,924 INFO L226 Difference]: Without dead ends: 251 [2023-11-12 02:12:01,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:01,927 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 0 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:01,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 666 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-12 02:12:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2023-11-12 02:12:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 190 states have (on average 1.5526315789473684) internal successors, (295), 190 states have internal predecessors, (295), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-12 02:12:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 413 transitions. [2023-11-12 02:12:01,973 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 413 transitions. Word has length 393 [2023-11-12 02:12:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:01,975 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 413 transitions. [2023-11-12 02:12:01,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 413 transitions. [2023-11-12 02:12:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-12 02:12:01,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:01,984 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:01,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:02,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:02,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1428426465, now seen corresponding path program 1 times [2023-11-12 02:12:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360839998] [2023-11-12 02:12:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:02,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:02,270 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:02,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122753247] [2023-11-12 02:12:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:02,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:02,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:02,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:02,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:12:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:02,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:12:02,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 58 proven. 174 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-12 02:12:03,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-12 02:12:03,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360839998] [2023-11-12 02:12:03,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122753247] [2023-11-12 02:12:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122753247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:03,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:03,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:12:03,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015670964] [2023-11-12 02:12:03,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:03,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:12:03,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:12:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:12:03,920 INFO L87 Difference]: Start difference. First operand 251 states and 413 transitions. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-12 02:12:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:04,475 INFO L93 Difference]: Finished difference Result 462 states and 753 transitions. [2023-11-12 02:12:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:12:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 3 states have call successors, (118) Word has length 393 [2023-11-12 02:12:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:04,480 INFO L225 Difference]: With dead ends: 462 [2023-11-12 02:12:04,480 INFO L226 Difference]: Without dead ends: 214 [2023-11-12 02:12:04,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:12:04,482 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 635 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:04,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 633 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:12:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-12 02:12:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2023-11-12 02:12:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 59 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-12 02:12:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 339 transitions. [2023-11-12 02:12:04,514 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 339 transitions. Word has length 393 [2023-11-12 02:12:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:04,516 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 339 transitions. [2023-11-12 02:12:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 2 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-12 02:12:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 339 transitions. [2023-11-12 02:12:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-12 02:12:04,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:04,521 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:04,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:04,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:04,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:04,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2115326342, now seen corresponding path program 1 times [2023-11-12 02:12:04,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:04,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932025] [2023-11-12 02:12:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:04,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:04,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014713440] [2023-11-12 02:12:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:04,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:04,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:04,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:12:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:05,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:12:05,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3408 proven. 99 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2023-11-12 02:12:05,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 75 proven. 99 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-12 02:12:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932025] [2023-11-12 02:12:06,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014713440] [2023-11-12 02:12:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014713440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:06,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:06,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:12:06,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907258722] [2023-11-12 02:12:06,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:06,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:12:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:12:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:12:06,023 INFO L87 Difference]: Start difference. First operand 212 states and 339 transitions. Second operand has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2023-11-12 02:12:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:06,545 INFO L93 Difference]: Finished difference Result 427 states and 680 transitions. [2023-11-12 02:12:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:12:06,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 393 [2023-11-12 02:12:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:06,549 INFO L225 Difference]: With dead ends: 427 [2023-11-12 02:12:06,550 INFO L226 Difference]: Without dead ends: 218 [2023-11-12 02:12:06,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:12:06,552 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 525 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:06,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 673 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:12:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-12 02:12:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2023-11-12 02:12:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 153 states have internal predecessors, (220), 59 states have call successors, (59), 3 states have call predecessors, (59), 3 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-12 02:12:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 338 transitions. [2023-11-12 02:12:06,584 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 338 transitions. Word has length 393 [2023-11-12 02:12:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:06,585 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 338 transitions. [2023-11-12 02:12:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2023-11-12 02:12:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 338 transitions. [2023-11-12 02:12:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-12 02:12:06,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:06,590 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:06,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:06,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:06,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:06,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash -114046237, now seen corresponding path program 1 times [2023-11-12 02:12:06,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:06,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653921793] [2023-11-12 02:12:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:06,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:06,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:06,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426753229] [2023-11-12 02:12:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:06,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:06,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:06,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:12:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:07,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:12:07,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 2148 proven. 141 refuted. 0 times theorem prover too weak. 4555 trivial. 0 not checked. [2023-11-12 02:12:08,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 33 proven. 141 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-12 02:12:09,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:09,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653921793] [2023-11-12 02:12:09,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:09,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426753229] [2023-11-12 02:12:09,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426753229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:09,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:09,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-12 02:12:09,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209869483] [2023-11-12 02:12:09,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:12:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:12:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:12:09,152 INFO L87 Difference]: Start difference. First operand 216 states and 338 transitions. Second operand has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:10,911 INFO L93 Difference]: Finished difference Result 890 states and 1413 transitions. [2023-11-12 02:12:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:12:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) Word has length 394 [2023-11-12 02:12:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:10,918 INFO L225 Difference]: With dead ends: 890 [2023-11-12 02:12:10,918 INFO L226 Difference]: Without dead ends: 677 [2023-11-12 02:12:10,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:12:10,921 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 902 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:10,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 2057 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 02:12:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-11-12 02:12:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 430. [2023-11-12 02:12:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 304 states have (on average 1.430921052631579) internal successors, (435), 304 states have internal predecessors, (435), 118 states have call successors, (118), 7 states have call predecessors, (118), 7 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2023-11-12 02:12:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 671 transitions. [2023-11-12 02:12:10,990 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 671 transitions. Word has length 394 [2023-11-12 02:12:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:10,991 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 671 transitions. [2023-11-12 02:12:10,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 671 transitions. [2023-11-12 02:12:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-12 02:12:10,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:10,996 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:11,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:11,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:12:11,204 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:11,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash -73371487, now seen corresponding path program 1 times [2023-11-12 02:12:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410011951] [2023-11-12 02:12:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:11,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66874603] [2023-11-12 02:12:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:11,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:11,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:11,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:11,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:12:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:11,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:12:11,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 1840 proven. 147 refuted. 0 times theorem prover too weak. 4857 trivial. 0 not checked. [2023-11-12 02:12:13,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 27 proven. 147 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-12 02:12:13,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:13,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410011951] [2023-11-12 02:12:13,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:13,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66874603] [2023-11-12 02:12:13,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66874603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:13,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:13,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-12 02:12:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903845639] [2023-11-12 02:12:13,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:13,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:12:13,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:12:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:12:13,705 INFO L87 Difference]: Start difference. First operand 430 states and 671 transitions. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:15,985 INFO L93 Difference]: Finished difference Result 2106 states and 3279 transitions. [2023-11-12 02:12:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:12:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) Word has length 394 [2023-11-12 02:12:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:16,000 INFO L225 Difference]: With dead ends: 2106 [2023-11-12 02:12:16,000 INFO L226 Difference]: Without dead ends: 1679 [2023-11-12 02:12:16,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:12:16,003 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 2658 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2716 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:16,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2716 Valid, 1644 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 02:12:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2023-11-12 02:12:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1421. [2023-11-12 02:12:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1084 states have (on average 1.4584870848708487) internal successors, (1581), 1086 states have internal predecessors, (1581), 313 states have call successors, (313), 23 states have call predecessors, (313), 23 states have return successors, (313), 311 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-12 02:12:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2207 transitions. [2023-11-12 02:12:16,210 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2207 transitions. Word has length 394 [2023-11-12 02:12:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:16,212 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 2207 transitions. [2023-11-12 02:12:16,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2207 transitions. [2023-11-12 02:12:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-11-12 02:12:16,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:16,217 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:16,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:16,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:12:16,429 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:16,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash -796264948, now seen corresponding path program 1 times [2023-11-12 02:12:16,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:16,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374075279] [2023-11-12 02:12:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:16,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:16,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396510284] [2023-11-12 02:12:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:16,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:16,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:16,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:12:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:16,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:12:16,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3040 proven. 0 refuted. 0 times theorem prover too weak. 3804 trivial. 0 not checked. [2023-11-12 02:12:18,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374075279] [2023-11-12 02:12:18,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396510284] [2023-11-12 02:12:18,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396510284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:18,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:18,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:12:18,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086100518] [2023-11-12 02:12:18,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:18,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:12:18,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:12:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:12:18,950 INFO L87 Difference]: Start difference. First operand 1421 states and 2207 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-12 02:12:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:20,087 INFO L93 Difference]: Finished difference Result 2605 states and 4037 transitions. [2023-11-12 02:12:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:12:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 395 [2023-11-12 02:12:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:20,103 INFO L225 Difference]: With dead ends: 2605 [2023-11-12 02:12:20,103 INFO L226 Difference]: Without dead ends: 1463 [2023-11-12 02:12:20,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:12:20,108 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 707 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1690 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:12:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2023-11-12 02:12:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1425. [2023-11-12 02:12:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1087 states have (on average 1.454461821527139) internal successors, (1581), 1089 states have internal predecessors, (1581), 313 states have call successors, (313), 24 states have call predecessors, (313), 24 states have return successors, (313), 311 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-12 02:12:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2207 transitions. [2023-11-12 02:12:20,313 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2207 transitions. Word has length 395 [2023-11-12 02:12:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:20,314 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2207 transitions. [2023-11-12 02:12:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-12 02:12:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2207 transitions. [2023-11-12 02:12:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-11-12 02:12:20,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:20,319 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:20,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:20,526 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:20,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1865366958, now seen corresponding path program 1 times [2023-11-12 02:12:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:20,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21779766] [2023-11-12 02:12:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:20,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995659219] [2023-11-12 02:12:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:20,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:20,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:12:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:20,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:12:20,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-12 02:12:21,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21779766] [2023-11-12 02:12:21,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995659219] [2023-11-12 02:12:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995659219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:21,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:12:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794874992] [2023-11-12 02:12:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:12:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:12:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:21,514 INFO L87 Difference]: Start difference. First operand 1425 states and 2207 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:22,074 INFO L93 Difference]: Finished difference Result 2643 states and 4093 transitions. [2023-11-12 02:12:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:12:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 396 [2023-11-12 02:12:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:22,086 INFO L225 Difference]: With dead ends: 2643 [2023-11-12 02:12:22,086 INFO L226 Difference]: Without dead ends: 1344 [2023-11-12 02:12:22,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:12:22,093 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 255 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:22,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1346 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:12:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2023-11-12 02:12:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1306. [2023-11-12 02:12:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 968 states have (on average 1.4318181818181819) internal successors, (1386), 970 states have internal predecessors, (1386), 313 states have call successors, (313), 24 states have call predecessors, (313), 24 states have return successors, (313), 311 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-12 02:12:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2012 transitions. [2023-11-12 02:12:22,317 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2012 transitions. Word has length 396 [2023-11-12 02:12:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:22,318 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 2012 transitions. [2023-11-12 02:12:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2012 transitions. [2023-11-12 02:12:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-11-12 02:12:22,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:22,322 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:22,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:22,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:22,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash 804075372, now seen corresponding path program 1 times [2023-11-12 02:12:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:22,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056493386] [2023-11-12 02:12:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:22,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:22,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719519079] [2023-11-12 02:12:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:22,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:22,604 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:22,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:12:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:23,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:23,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-12 02:12:23,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:23,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:23,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056493386] [2023-11-12 02:12:23,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:23,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719519079] [2023-11-12 02:12:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719519079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:23,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:12:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951321305] [2023-11-12 02:12:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:23,506 INFO L87 Difference]: Start difference. First operand 1306 states and 2012 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:23,784 INFO L93 Difference]: Finished difference Result 3642 states and 5641 transitions. [2023-11-12 02:12:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 396 [2023-11-12 02:12:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:23,803 INFO L225 Difference]: With dead ends: 3642 [2023-11-12 02:12:23,803 INFO L226 Difference]: Without dead ends: 2476 [2023-11-12 02:12:23,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:23,808 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 153 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:23,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 638 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2023-11-12 02:12:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2474. [2023-11-12 02:12:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 1864 states have (on average 1.440450643776824) internal successors, (2685), 1868 states have internal predecessors, (2685), 567 states have call successors, (567), 42 states have call predecessors, (567), 42 states have return successors, (567), 563 states have call predecessors, (567), 567 states have call successors, (567) [2023-11-12 02:12:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3819 transitions. [2023-11-12 02:12:24,144 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3819 transitions. Word has length 396 [2023-11-12 02:12:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:24,145 INFO L495 AbstractCegarLoop]: Abstraction has 2474 states and 3819 transitions. [2023-11-12 02:12:24,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-12 02:12:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3819 transitions. [2023-11-12 02:12:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-11-12 02:12:24,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:24,149 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:24,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:24,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:12:24,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:24,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1920752272, now seen corresponding path program 1 times [2023-11-12 02:12:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:24,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780659530] [2023-11-12 02:12:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:24,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:24,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322972347] [2023-11-12 02:12:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:24,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:24,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:24,420 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:24,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:12:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:24,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:12:24,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3390 proven. 72 refuted. 0 times theorem prover too weak. 3382 trivial. 0 not checked. [2023-11-12 02:12:25,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 102 proven. 72 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-12 02:12:26,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780659530] [2023-11-12 02:12:26,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322972347] [2023-11-12 02:12:26,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322972347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:26,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:26,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-12 02:12:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489826615] [2023-11-12 02:12:26,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:12:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:12:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:12:26,461 INFO L87 Difference]: Start difference. First operand 2474 states and 3819 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:30,641 INFO L93 Difference]: Finished difference Result 10586 states and 16295 transitions. [2023-11-12 02:12:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:12:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) Word has length 396 [2023-11-12 02:12:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:30,699 INFO L225 Difference]: With dead ends: 10586 [2023-11-12 02:12:30,700 INFO L226 Difference]: Without dead ends: 8264 [2023-11-12 02:12:30,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:12:30,709 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 2552 mSDsluCounter, 3323 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:30,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2626 Valid, 3576 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-12 02:12:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2023-11-12 02:12:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 6282. [2023-11-12 02:12:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6282 states, 4783 states have (on average 1.4472088647292494) internal successors, (6922), 4803 states have internal predecessors, (6922), 1375 states have call successors, (1375), 123 states have call predecessors, (1375), 123 states have return successors, (1375), 1355 states have call predecessors, (1375), 1375 states have call successors, (1375) [2023-11-12 02:12:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6282 states to 6282 states and 9672 transitions. [2023-11-12 02:12:31,758 INFO L78 Accepts]: Start accepts. Automaton has 6282 states and 9672 transitions. Word has length 396 [2023-11-12 02:12:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:31,760 INFO L495 AbstractCegarLoop]: Abstraction has 6282 states and 9672 transitions. [2023-11-12 02:12:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6282 states and 9672 transitions. [2023-11-12 02:12:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-11-12 02:12:31,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:31,783 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:31,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:31,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:31,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:31,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1476821746, now seen corresponding path program 1 times [2023-11-12 02:12:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:31,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422679111] [2023-11-12 02:12:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:31,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:32,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:12:32,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425022164] [2023-11-12 02:12:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:32,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:32,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:32,070 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:32,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:12:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:12:32,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 1674 proven. 150 refuted. 0 times theorem prover too weak. 5020 trivial. 0 not checked. [2023-11-12 02:12:34,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 24 proven. 150 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-12 02:12:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422679111] [2023-11-12 02:12:34,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:12:34,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425022164] [2023-11-12 02:12:34,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425022164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:34,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:34,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-12 02:12:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851453328] [2023-11-12 02:12:34,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:12:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:12:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:12:34,961 INFO L87 Difference]: Start difference. First operand 6282 states and 9672 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:39,306 INFO L93 Difference]: Finished difference Result 22195 states and 33874 transitions. [2023-11-12 02:12:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:12:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) Word has length 396 [2023-11-12 02:12:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:39,403 INFO L225 Difference]: With dead ends: 22195 [2023-11-12 02:12:39,404 INFO L226 Difference]: Without dead ends: 16189 [2023-11-12 02:12:39,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:12:39,424 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1107 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:39,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1222 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 02:12:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16189 states. [2023-11-12 02:12:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16189 to 10951. [2023-11-12 02:12:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10951 states, 8307 states have (on average 1.4274708077524978) internal successors, (11858), 8345 states have internal predecessors, (11858), 2401 states have call successors, (2401), 242 states have call predecessors, (2401), 242 states have return successors, (2401), 2363 states have call predecessors, (2401), 2401 states have call successors, (2401) [2023-11-12 02:12:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10951 states to 10951 states and 16660 transitions. [2023-11-12 02:12:41,485 INFO L78 Accepts]: Start accepts. Automaton has 10951 states and 16660 transitions. Word has length 396 [2023-11-12 02:12:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:41,486 INFO L495 AbstractCegarLoop]: Abstraction has 10951 states and 16660 transitions. [2023-11-12 02:12:41,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-12 02:12:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10951 states and 16660 transitions. [2023-11-12 02:12:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-12 02:12:41,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:41,491 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:41,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c7d62f-ccff-43f5-9321-4cb84f7c9a46/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0