./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-16.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_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/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_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-16.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/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_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/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 da982387660185d291ba506664c590935ec691dede2a6c22408e1c80bc2337b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:14:38,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:14:38,837 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:14:38,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:14:38,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:14:38,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:14:38,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:14:38,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:14:38,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:14:38,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:14:38,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:14:38,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:14:38,875 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:14:38,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:14:38,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:14:38,877 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:14:38,878 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:14:38,878 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:14:38,879 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:14:38,880 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:14:38,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:14:38,881 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:14:38,881 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:14:38,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:14:38,882 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:14:38,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:14:38,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:14:38,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:14:38,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:38,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:14:38,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:14:38,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:14:38,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:14:38,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:14:38,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:14:38,888 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:14:38,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:14:38,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:14:38,889 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:14:38,890 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_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da982387660185d291ba506664c590935ec691dede2a6c22408e1c80bc2337b3 [2023-11-12 02:14:39,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:14:39,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:14:39,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:14:39,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:14:39,208 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:14:39,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-16.i [2023-11-12 02:14:42,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:14:42,612 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:14:42,612 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-16.i [2023-11-12 02:14:42,623 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/data/fc1f79ab6/4eb40ce308e741cab7ada283ca2d8ed4/FLAG80df9bb75 [2023-11-12 02:14:42,639 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/data/fc1f79ab6/4eb40ce308e741cab7ada283ca2d8ed4 [2023-11-12 02:14:42,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:14:42,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:14:42,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:42,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:14:42,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:14:42,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:42" (1/1) ... [2023-11-12 02:14:42,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb8e5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:42, skipping insertion in model container [2023-11-12 02:14:42,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:42" (1/1) ... [2023-11-12 02:14:42,685 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:14:42,892 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_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-16.i[917,930] [2023-11-12 02:14:42,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:42,968 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:14:42,979 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_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-16.i[917,930] [2023-11-12 02:14:43,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:43,033 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:14:43,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43 WrapperNode [2023-11-12 02:14:43,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:43,034 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:43,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:14:43,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:14:43,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,093 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 190 [2023-11-12 02:14:43,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:43,094 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:14:43,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:14:43,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:14:43,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,122 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:14:43,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:14:43,166 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:14:43,166 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:14:43,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (1/1) ... [2023-11-12 02:14:43,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:43,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:14:43,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:14:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:14:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:14:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:14:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:14:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:14:43,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:14:43,386 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:14:43,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:14:43,830 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:14:43,838 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:14:43,838 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:14:43,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:43 BoogieIcfgContainer [2023-11-12 02:14:43,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:14:43,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:14:43,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:14:43,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:14:43,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:14:42" (1/3) ... [2023-11-12 02:14:43,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2da585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:43, skipping insertion in model container [2023-11-12 02:14:43,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:43" (2/3) ... [2023-11-12 02:14:43,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2da585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:43, skipping insertion in model container [2023-11-12 02:14:43,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:43" (3/3) ... [2023-11-12 02:14:43,859 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_steplocals_file-16.i [2023-11-12 02:14:43,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:14:43,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:14:43,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:43,996 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;@1c66b3b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:43,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:14:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 54 states have internal predecessors, (74), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:14:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:44,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:44,026 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:44,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:44,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash 880938426, now seen corresponding path program 1 times [2023-11-12 02:14:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110059167] [2023-11-12 02:14:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110059167] [2023-11-12 02:14:44,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:14:44,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178846891] [2023-11-12 02:14:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:44,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:44,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:44,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:44,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:14:44,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-11-12 02:14:44,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178846891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:44,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623319620] [2023-11-12 02:14:44,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:14:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:14:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:14:44,794 INFO L87 Difference]: Start difference. First operand has 82 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 54 states have internal predecessors, (74), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 02:14:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:44,830 INFO L93 Difference]: Finished difference Result 157 states and 272 transitions. [2023-11-12 02:14:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:14:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) Word has length 169 [2023-11-12 02:14:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:44,841 INFO L225 Difference]: With dead ends: 157 [2023-11-12 02:14:44,841 INFO L226 Difference]: Without dead ends: 78 [2023-11-12 02:14:44,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 168 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 02:14:44,850 INFO L413 NwaCegarLoop]: 119 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, 119 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 02:14:44,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-12 02:14:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-12 02:14:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:14:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 119 transitions. [2023-11-12 02:14:44,918 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 119 transitions. Word has length 169 [2023-11-12 02:14:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:44,919 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 119 transitions. [2023-11-12 02:14:44,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 02:14:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 119 transitions. [2023-11-12 02:14:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:44,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:44,932 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:44,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:45,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:14:45,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:45,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -259764990, now seen corresponding path program 1 times [2023-11-12 02:14:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:45,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583435319] [2023-11-12 02:14:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:45,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:45,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:45,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123445013] [2023-11-12 02:14:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:45,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:45,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:45,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:14:45,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:14:47,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:47,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583435319] [2023-11-12 02:14:47,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123445013] [2023-11-12 02:14:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123445013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:47,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:14:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699504187] [2023-11-12 02:14:47,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:47,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:47,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:47,628 INFO L87 Difference]: Start difference. First operand 78 states and 119 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:14:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:48,203 INFO L93 Difference]: Finished difference Result 232 states and 353 transitions. [2023-11-12 02:14:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:14:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 169 [2023-11-12 02:14:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:48,209 INFO L225 Difference]: With dead ends: 232 [2023-11-12 02:14:48,209 INFO L226 Difference]: Without dead ends: 157 [2023-11-12 02:14:48,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:14:48,213 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 238 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:48,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 452 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:14:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-12 02:14:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 98. [2023-11-12 02:14:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:14:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 152 transitions. [2023-11-12 02:14:48,233 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 152 transitions. Word has length 169 [2023-11-12 02:14:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:48,238 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 152 transitions. [2023-11-12 02:14:48,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:14:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 152 transitions. [2023-11-12 02:14:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:48,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:48,244 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:48,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:48,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:48,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:48,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 761303364, now seen corresponding path program 1 times [2023-11-12 02:14:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286485862] [2023-11-12 02:14:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:48,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700452134] [2023-11-12 02:14:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:48,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:48,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:48,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:14:48,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 735 proven. 87 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2023-11-12 02:14:51,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:14:55,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286485862] [2023-11-12 02:14:55,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:55,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700452134] [2023-11-12 02:14:55,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700452134] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:55,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:55,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 24 [2023-11-12 02:14:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770550169] [2023-11-12 02:14:55,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:14:55,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:14:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:14:55,636 INFO L87 Difference]: Start difference. First operand 98 states and 152 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:14:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:58,194 INFO L93 Difference]: Finished difference Result 366 states and 534 transitions. [2023-11-12 02:14:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:14:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 169 [2023-11-12 02:14:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:58,199 INFO L225 Difference]: With dead ends: 366 [2023-11-12 02:14:58,200 INFO L226 Difference]: Without dead ends: 271 [2023-11-12 02:14:58,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:14:58,203 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 388 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:58,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 517 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-12 02:14:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 107. [2023-11-12 02:14:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.4683544303797469) internal successors, (116), 79 states have internal predecessors, (116), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:14:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 168 transitions. [2023-11-12 02:14:58,225 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 168 transitions. Word has length 169 [2023-11-12 02:14:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:58,226 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 168 transitions. [2023-11-12 02:14:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:14:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 168 transitions. [2023-11-12 02:14:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:14:58,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:58,229 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:58,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:14:58,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1758656570, now seen corresponding path program 1 times [2023-11-12 02:14:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29759754] [2023-11-12 02:14:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:58,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:58,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442100027] [2023-11-12 02:14:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:58,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:58,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:58,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:58,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:14:58,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:14:59,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:59,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29759754] [2023-11-12 02:14:59,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442100027] [2023-11-12 02:14:59,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442100027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:59,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:59,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:14:59,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129500917] [2023-11-12 02:14:59,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:59,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:59,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:59,688 INFO L87 Difference]: Start difference. First operand 107 states and 168 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:00,179 INFO L93 Difference]: Finished difference Result 281 states and 435 transitions. [2023-11-12 02:15:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:15:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 169 [2023-11-12 02:15:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:00,188 INFO L225 Difference]: With dead ends: 281 [2023-11-12 02:15:00,188 INFO L226 Difference]: Without dead ends: 177 [2023-11-12 02:15:00,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:15:00,190 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 192 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:00,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 479 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:15:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-12 02:15:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 95. [2023-11-12 02:15:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 147 transitions. [2023-11-12 02:15:00,204 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 147 transitions. Word has length 169 [2023-11-12 02:15:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:00,205 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 147 transitions. [2023-11-12 02:15:00,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 147 transitions. [2023-11-12 02:15:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:15:00,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:00,208 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:00,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:15:00,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:00,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:00,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1848112892, now seen corresponding path program 1 times [2023-11-12 02:15:00,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:00,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049070869] [2023-11-12 02:15:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:00,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:00,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138068047] [2023-11-12 02:15:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:00,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:00,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:15:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:00,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:15:00,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:01,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:01,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:01,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049070869] [2023-11-12 02:15:01,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:01,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138068047] [2023-11-12 02:15:01,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138068047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:01,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:01,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:15:01,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717722110] [2023-11-12 02:15:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:01,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:15:01,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:15:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:15:01,527 INFO L87 Difference]: Start difference. First operand 95 states and 147 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:02,011 INFO L93 Difference]: Finished difference Result 249 states and 380 transitions. [2023-11-12 02:15:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:15:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 169 [2023-11-12 02:15:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:02,014 INFO L225 Difference]: With dead ends: 249 [2023-11-12 02:15:02,015 INFO L226 Difference]: Without dead ends: 157 [2023-11-12 02:15:02,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:15:02,017 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 185 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:02,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 589 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:15:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-12 02:15:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 99. [2023-11-12 02:15:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 71 states have internal predecessors, (102), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 154 transitions. [2023-11-12 02:15:02,037 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 154 transitions. Word has length 169 [2023-11-12 02:15:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:02,038 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 154 transitions. [2023-11-12 02:15:02,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 154 transitions. [2023-11-12 02:15:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 02:15:02,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:02,041 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:02,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:15:02,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:02,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:02,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -827044538, now seen corresponding path program 1 times [2023-11-12 02:15:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:02,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307333708] [2023-11-12 02:15:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:02,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:02,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670753735] [2023-11-12 02:15:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:02,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:02,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:02,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:02,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:15:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:02,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:15:02,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:03,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:03,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307333708] [2023-11-12 02:15:03,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670753735] [2023-11-12 02:15:03,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670753735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:03,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:03,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:15:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781084198] [2023-11-12 02:15:03,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:03,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:15:03,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:03,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:15:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:15:03,263 INFO L87 Difference]: Start difference. First operand 99 states and 154 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:03,802 INFO L93 Difference]: Finished difference Result 264 states and 404 transitions. [2023-11-12 02:15:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:15:03,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 169 [2023-11-12 02:15:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:03,805 INFO L225 Difference]: With dead ends: 264 [2023-11-12 02:15:03,805 INFO L226 Difference]: Without dead ends: 168 [2023-11-12 02:15:03,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:15:03,807 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 189 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:03,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 561 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:15:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-12 02:15:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 95. [2023-11-12 02:15:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 147 transitions. [2023-11-12 02:15:03,819 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 147 transitions. Word has length 169 [2023-11-12 02:15:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:03,820 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 147 transitions. [2023-11-12 02:15:03,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 147 transitions. [2023-11-12 02:15:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:03,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:03,823 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:03,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:04,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:04,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:04,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1703556457, now seen corresponding path program 1 times [2023-11-12 02:15:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:04,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781433028] [2023-11-12 02:15:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:04,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:04,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023980575] [2023-11-12 02:15:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:04,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:04,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:04,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:15:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:04,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:15:04,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:04,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:04,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:04,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781433028] [2023-11-12 02:15:04,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:04,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023980575] [2023-11-12 02:15:04,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023980575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:04,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:04,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:15:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710246713] [2023-11-12 02:15:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:04,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:15:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:04,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:15:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:15:04,288 INFO L87 Difference]: Start difference. First operand 95 states and 147 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:04,338 INFO L93 Difference]: Finished difference Result 234 states and 360 transitions. [2023-11-12 02:15:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:15:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:04,347 INFO L225 Difference]: With dead ends: 234 [2023-11-12 02:15:04,347 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 02:15:04,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 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 02:15:04,349 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:04,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 246 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:15:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 02:15:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2023-11-12 02:15:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 106 states have (on average 1.4245283018867925) internal successors, (151), 107 states have internal predecessors, (151), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:15:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2023-11-12 02:15:04,376 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 170 [2023-11-12 02:15:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:04,377 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2023-11-12 02:15:04,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2023-11-12 02:15:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:04,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:04,381 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:04,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 02:15:04,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:04,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:04,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash -816403477, now seen corresponding path program 1 times [2023-11-12 02:15:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512803878] [2023-11-12 02:15:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:04,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:04,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156835690] [2023-11-12 02:15:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:04,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:04,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:04,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:04,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:15:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:04,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:15:04,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 720 proven. 90 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-11-12 02:15:06,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:07,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512803878] [2023-11-12 02:15:07,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:07,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156835690] [2023-11-12 02:15:07,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156835690] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:07,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:07,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 21 [2023-11-12 02:15:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344010267] [2023-11-12 02:15:07,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:15:07,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:15:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:15:07,846 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:09,094 INFO L93 Difference]: Finished difference Result 583 states and 850 transitions. [2023-11-12 02:15:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:15:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:09,102 INFO L225 Difference]: With dead ends: 583 [2023-11-12 02:15:09,103 INFO L226 Difference]: Without dead ends: 447 [2023-11-12 02:15:09,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2023-11-12 02:15:09,105 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 265 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:09,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 568 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:15:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-12 02:15:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 170. [2023-11-12 02:15:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 137 states have (on average 1.4817518248175183) internal successors, (203), 138 states have internal predecessors, (203), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:15:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 263 transitions. [2023-11-12 02:15:09,131 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 263 transitions. Word has length 170 [2023-11-12 02:15:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:09,132 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 263 transitions. [2023-11-12 02:15:09,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 263 transitions. [2023-11-12 02:15:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:09,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:09,134 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:09,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:15:09,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:09,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:09,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash -136345107, now seen corresponding path program 1 times [2023-11-12 02:15:09,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:09,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841952021] [2023-11-12 02:15:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:09,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:09,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764079980] [2023-11-12 02:15:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:09,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:09,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:09,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:09,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:15:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:09,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:15:09,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:10,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841952021] [2023-11-12 02:15:10,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764079980] [2023-11-12 02:15:10,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764079980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:10,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:10,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:15:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533673237] [2023-11-12 02:15:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:10,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:15:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:15:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:15:10,112 INFO L87 Difference]: Start difference. First operand 170 states and 263 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:10,610 INFO L93 Difference]: Finished difference Result 483 states and 715 transitions. [2023-11-12 02:15:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:15:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:10,613 INFO L225 Difference]: With dead ends: 483 [2023-11-12 02:15:10,614 INFO L226 Difference]: Without dead ends: 316 [2023-11-12 02:15:10,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:15:10,615 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 279 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 548 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:15:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-12 02:15:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 181. [2023-11-12 02:15:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 149 states have internal predecessors, (219), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:15:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 279 transitions. [2023-11-12 02:15:10,637 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 279 transitions. Word has length 170 [2023-11-12 02:15:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:10,638 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 279 transitions. [2023-11-12 02:15:10,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 279 transitions. [2023-11-12 02:15:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:10,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:10,641 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:10,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:10,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:10,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:10,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash 204664877, now seen corresponding path program 1 times [2023-11-12 02:15:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:10,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314693202] [2023-11-12 02:15:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:10,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094548380] [2023-11-12 02:15:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:10,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:10,879 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:10,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:15:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:11,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:15:11,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 695 proven. 87 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2023-11-12 02:15:12,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:13,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:13,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314693202] [2023-11-12 02:15:13,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:13,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094548380] [2023-11-12 02:15:13,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094548380] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:13,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:13,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 16 [2023-11-12 02:15:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838510308] [2023-11-12 02:15:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:13,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:15:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:15:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:15:13,647 INFO L87 Difference]: Start difference. First operand 181 states and 279 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:14,129 INFO L93 Difference]: Finished difference Result 500 states and 754 transitions. [2023-11-12 02:15:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:15:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:14,132 INFO L225 Difference]: With dead ends: 500 [2023-11-12 02:15:14,132 INFO L226 Difference]: Without dead ends: 322 [2023-11-12 02:15:14,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:15:14,134 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 186 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:14,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 397 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:15:14,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-12 02:15:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 141. [2023-11-12 02:15:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 112 states have internal predecessors, (163), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 215 transitions. [2023-11-12 02:15:14,156 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 215 transitions. Word has length 170 [2023-11-12 02:15:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:14,157 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 215 transitions. [2023-11-12 02:15:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 215 transitions. [2023-11-12 02:15:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:14,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:14,159 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:14,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:14,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:14,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1890215917, now seen corresponding path program 1 times [2023-11-12 02:15:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008542584] [2023-11-12 02:15:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:14,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:14,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:14,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252675251] [2023-11-12 02:15:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:14,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:14,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:14,395 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:14,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:15:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:14,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:15:14,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:15,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008542584] [2023-11-12 02:15:15,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252675251] [2023-11-12 02:15:15,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252675251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:15,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:15,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:15:15,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581484960] [2023-11-12 02:15:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:15,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:15,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:15,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:15,059 INFO L87 Difference]: Start difference. First operand 141 states and 215 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:15,340 INFO L93 Difference]: Finished difference Result 354 states and 528 transitions. [2023-11-12 02:15:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:15:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:15,343 INFO L225 Difference]: With dead ends: 354 [2023-11-12 02:15:15,343 INFO L226 Difference]: Without dead ends: 216 [2023-11-12 02:15:15,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:15:15,345 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 142 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:15,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 466 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:15:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-12 02:15:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 141. [2023-11-12 02:15:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.4553571428571428) internal successors, (163), 112 states have internal predecessors, (163), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 215 transitions. [2023-11-12 02:15:15,363 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 215 transitions. Word has length 170 [2023-11-12 02:15:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:15,364 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 215 transitions. [2023-11-12 02:15:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 215 transitions. [2023-11-12 02:15:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:15,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:15,367 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:15,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:15,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1383683025, now seen corresponding path program 1 times [2023-11-12 02:15:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539921503] [2023-11-12 02:15:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:15,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:15,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736537099] [2023-11-12 02:15:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:15,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:15,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:15,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:15,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:15:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:15,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:15:15,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:16,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:16,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:16,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539921503] [2023-11-12 02:15:16,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736537099] [2023-11-12 02:15:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736537099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:16,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:16,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:15:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880780543] [2023-11-12 02:15:16,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:16,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:16,396 INFO L87 Difference]: Start difference. First operand 141 states and 215 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:16,806 INFO L93 Difference]: Finished difference Result 365 states and 543 transitions. [2023-11-12 02:15:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:15:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:16,809 INFO L225 Difference]: With dead ends: 365 [2023-11-12 02:15:16,809 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 02:15:16,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:15:16,811 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 112 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:16,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 638 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:15:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 02:15:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 136. [2023-11-12 02:15:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 107 states have (on average 1.4485981308411215) internal successors, (155), 107 states have internal predecessors, (155), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 207 transitions. [2023-11-12 02:15:16,831 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 207 transitions. Word has length 170 [2023-11-12 02:15:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:16,832 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 207 transitions. [2023-11-12 02:15:16,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 207 transitions. [2023-11-12 02:15:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:16,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:16,834 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:16,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:17,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:17,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:17,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -902467097, now seen corresponding path program 1 times [2023-11-12 02:15:17,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:17,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261173461] [2023-11-12 02:15:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:17,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:17,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329433237] [2023-11-12 02:15:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:17,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:17,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:17,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:15:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:17,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:15:17,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 720 proven. 90 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-11-12 02:15:19,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:23,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261173461] [2023-11-12 02:15:23,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329433237] [2023-11-12 02:15:23,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329433237] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:23,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:23,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 19 [2023-11-12 02:15:23,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10179741] [2023-11-12 02:15:23,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:23,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:15:23,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:15:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:15:23,560 INFO L87 Difference]: Start difference. First operand 136 states and 207 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:24,994 INFO L93 Difference]: Finished difference Result 401 states and 611 transitions. [2023-11-12 02:15:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:15:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 170 [2023-11-12 02:15:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:24,998 INFO L225 Difference]: With dead ends: 401 [2023-11-12 02:15:24,998 INFO L226 Difference]: Without dead ends: 268 [2023-11-12 02:15:24,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:15:25,000 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 243 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:25,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 553 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:15:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-12 02:15:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 140. [2023-11-12 02:15:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 111 states have (on average 1.4594594594594594) internal successors, (162), 111 states have internal predecessors, (162), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 02:15:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 214 transitions. [2023-11-12 02:15:25,019 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 214 transitions. Word has length 170 [2023-11-12 02:15:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:25,020 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 214 transitions. [2023-11-12 02:15:25,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-12 02:15:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 214 transitions. [2023-11-12 02:15:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-12 02:15:25,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:25,023 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:25,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:25,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:25,230 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:25,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash 118601257, now seen corresponding path program 1 times [2023-11-12 02:15:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755755968] [2023-11-12 02:15:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:25,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:25,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:25,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331216232] [2023-11-12 02:15:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:25,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:25,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:25,259 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:25,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3093d3e-9bb7-45ba-a394-8cf1c6189e99/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:15:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:25,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 02:15:25,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 695 proven. 87 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2023-11-12 02:15:29,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-12 02:15:33,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755755968] [2023-11-12 02:15:33,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331216232] [2023-11-12 02:15:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331216232] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:33,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:33,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2023-11-12 02:15:33,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215432232] [2023-11-12 02:15:33,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:15:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:15:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:15:33,765 INFO L87 Difference]: Start difference. First operand 140 states and 214 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26)