./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-26.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/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_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-26.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/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_5846acd3-d5ba-4091-a87e-293119233733/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 2e667493c61c3f8002b3fd47b244ecacaeeb86310cf93e50fd4a8ca6ac8d2b98 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:28:41,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:28:41,100 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:28:41,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:28:41,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:28:41,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:28:41,138 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:28:41,138 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:28:41,139 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:28:41,140 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:28:41,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:28:41,142 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:28:41,142 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:28:41,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:28:41,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:28:41,144 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:28:41,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:28:41,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:28:41,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:28:41,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:28:41,148 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:28:41,152 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:28:41,153 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:28:41,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:28:41,154 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:28:41,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:28:41,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:28:41,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:28:41,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:41,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:28:41,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:28:41,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:28:41,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:28:41,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:28:41,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:28:41,159 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:28:41,160 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:28:41,160 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:28:41,160 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:28:41,161 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_5846acd3-d5ba-4091-a87e-293119233733/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e667493c61c3f8002b3fd47b244ecacaeeb86310cf93e50fd4a8ca6ac8d2b98 [2023-11-12 02:28:41,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:28:41,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:28:41,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:28:41,486 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:28:41,487 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:28:41,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-26.i [2023-11-12 02:28:44,714 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:28:45,095 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:28:45,105 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-26.i [2023-11-12 02:28:45,128 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/data/b289cce1d/5e57f231d39c49ed832238fac0c4e57e/FLAGa5b3928c1 [2023-11-12 02:28:45,144 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/data/b289cce1d/5e57f231d39c49ed832238fac0c4e57e [2023-11-12 02:28:45,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:28:45,148 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:28:45,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:45,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:28:45,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:28:45,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:45,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d59fc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45, skipping insertion in model container [2023-11-12 02:28:45,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:45,224 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:28:45,394 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_5846acd3-d5ba-4091-a87e-293119233733/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-26.i[916,929] [2023-11-12 02:28:45,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:45,636 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:28:45,650 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_5846acd3-d5ba-4091-a87e-293119233733/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-26.i[916,929] [2023-11-12 02:28:45,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:45,839 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:28:45,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45 WrapperNode [2023-11-12 02:28:45,840 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:45,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:45,841 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:28:45,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:28:45,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:45,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,002 INFO L138 Inliner]: procedures = 26, calls = 114, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 812 [2023-11-12 02:28:46,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:46,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:28:46,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:28:46,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:28:46,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,138 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:28:46,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:28:46,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:28:46,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:28:46,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (1/1) ... [2023-11-12 02:28:46,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:46,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:46,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:28:46,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:28:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:28:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:28:46,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:28:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:28:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:28:46,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:28:46,415 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:28:46,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:28:47,659 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:28:47,670 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:28:47,671 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:28:47,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:47 BoogieIcfgContainer [2023-11-12 02:28:47,674 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:28:47,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:28:47,677 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:28:47,680 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:28:47,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:28:45" (1/3) ... [2023-11-12 02:28:47,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179bf805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:47, skipping insertion in model container [2023-11-12 02:28:47,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:45" (2/3) ... [2023-11-12 02:28:47,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179bf805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:47, skipping insertion in model container [2023-11-12 02:28:47,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:47" (3/3) ... [2023-11-12 02:28:47,684 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-26.i [2023-11-12 02:28:47,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:28:47,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:28:47,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:47,772 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;@2502fb4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:47,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:28:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 316 states, 212 states have (on average 1.6273584905660377) internal successors, (345), 213 states have internal predecessors, (345), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-12 02:28:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2023-11-12 02:28:47,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:47,819 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:47,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:47,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash 402557569, now seen corresponding path program 1 times [2023-11-12 02:28:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599765606] [2023-11-12 02:28:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:47,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:48,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:48,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599765606] [2023-11-12 02:28:48,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:28:48,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043001001] [2023-11-12 02:28:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:48,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:48,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:48,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:28:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:48,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:28:49,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 20000 trivial. 0 not checked. [2023-11-12 02:28:49,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:49,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043001001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:49,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:49,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4177586] [2023-11-12 02:28:49,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:28:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:28:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:28:49,198 INFO L87 Difference]: Start difference. First operand has 316 states, 212 states have (on average 1.6273584905660377) internal successors, (345), 213 states have internal predecessors, (345), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (101), 2 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-12 02:28:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:49,294 INFO L93 Difference]: Finished difference Result 625 states and 1189 transitions. [2023-11-12 02:28:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:28:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (101), 2 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 2 states have call successors, (101) Word has length 647 [2023-11-12 02:28:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:49,310 INFO L225 Difference]: With dead ends: 625 [2023-11-12 02:28:49,311 INFO L226 Difference]: Without dead ends: 312 [2023-11-12 02:28:49,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 646 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 02:28:49,323 INFO L413 NwaCegarLoop]: 539 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, 539 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 02:28:49,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:28:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-12 02:28:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2023-11-12 02:28:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 209 states have (on average 1.61244019138756) internal successors, (337), 209 states have internal predecessors, (337), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-12 02:28:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 539 transitions. [2023-11-12 02:28:49,458 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 539 transitions. Word has length 647 [2023-11-12 02:28:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:49,462 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 539 transitions. [2023-11-12 02:28:49,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (101), 2 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-12 02:28:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 539 transitions. [2023-11-12 02:28:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2023-11-12 02:28:49,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:49,486 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:49,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:49,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:28:49,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:49,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1695400581, now seen corresponding path program 1 times [2023-11-12 02:28:49,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:49,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053132245] [2023-11-12 02:28:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:49,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290371416] [2023-11-12 02:28:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:49,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:49,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:28:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:50,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:28:50,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:28:50,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:50,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053132245] [2023-11-12 02:28:50,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290371416] [2023-11-12 02:28:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290371416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:50,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:50,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:28:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27342621] [2023-11-12 02:28:50,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:50,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:28:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:28:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:28:50,785 INFO L87 Difference]: Start difference. First operand 312 states and 539 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:51,235 INFO L93 Difference]: Finished difference Result 979 states and 1709 transitions. [2023-11-12 02:28:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:28:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 647 [2023-11-12 02:28:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:51,256 INFO L225 Difference]: With dead ends: 979 [2023-11-12 02:28:51,256 INFO L226 Difference]: Without dead ends: 670 [2023-11-12 02:28:51,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:28:51,260 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 588 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1767 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:28:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-11-12 02:28:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 584. [2023-11-12 02:28:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 448 states have (on average 1.6852678571428572) internal successors, (755), 449 states have internal predecessors, (755), 133 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2023-11-12 02:28:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1021 transitions. [2023-11-12 02:28:51,406 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1021 transitions. Word has length 647 [2023-11-12 02:28:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:51,410 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 1021 transitions. [2023-11-12 02:28:51,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1021 transitions. [2023-11-12 02:28:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-12 02:28:51,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:51,431 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:51,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:51,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:51,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:51,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 320718303, now seen corresponding path program 1 times [2023-11-12 02:28:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:51,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890359158] [2023-11-12 02:28:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:51,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:51,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709604661] [2023-11-12 02:28:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:51,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:51,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:51,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:28:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:52,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:28:52,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:28:52,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:52,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890359158] [2023-11-12 02:28:52,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709604661] [2023-11-12 02:28:52,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709604661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:52,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:52,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:28:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476713001] [2023-11-12 02:28:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:28:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:28:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:28:52,435 INFO L87 Difference]: Start difference. First operand 584 states and 1021 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:52,787 INFO L93 Difference]: Finished difference Result 1595 states and 2773 transitions. [2023-11-12 02:28:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:28:52,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 648 [2023-11-12 02:28:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:52,799 INFO L225 Difference]: With dead ends: 1595 [2023-11-12 02:28:52,799 INFO L226 Difference]: Without dead ends: 1014 [2023-11-12 02:28:52,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:28:52,803 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 637 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:52,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1541 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:28:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-11-12 02:28:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 847. [2023-11-12 02:28:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 640 states have (on average 1.665625) internal successors, (1066), 643 states have internal predecessors, (1066), 202 states have call successors, (202), 4 states have call predecessors, (202), 4 states have return successors, (202), 199 states have call predecessors, (202), 202 states have call successors, (202) [2023-11-12 02:28:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1470 transitions. [2023-11-12 02:28:52,891 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1470 transitions. Word has length 648 [2023-11-12 02:28:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:52,893 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1470 transitions. [2023-11-12 02:28:52,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1470 transitions. [2023-11-12 02:28:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-12 02:28:52,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:52,913 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:52,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:53,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:53,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:53,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash 861116259, now seen corresponding path program 1 times [2023-11-12 02:28:53,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:53,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233015133] [2023-11-12 02:28:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:53,247 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488170661] [2023-11-12 02:28:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:53,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:53,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:53,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:28:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:53,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:28:53,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:28:53,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:53,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:53,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233015133] [2023-11-12 02:28:53,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:53,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488170661] [2023-11-12 02:28:53,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488170661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:53,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:28:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063561338] [2023-11-12 02:28:53,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:53,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:53,816 INFO L87 Difference]: Start difference. First operand 847 states and 1470 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:53,915 INFO L93 Difference]: Finished difference Result 2146 states and 3667 transitions. [2023-11-12 02:28:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 648 [2023-11-12 02:28:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:53,928 INFO L225 Difference]: With dead ends: 2146 [2023-11-12 02:28:53,929 INFO L226 Difference]: Without dead ends: 1302 [2023-11-12 02:28:53,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 646 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 02:28:53,936 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 304 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:53,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1068 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:28:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2023-11-12 02:28:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1299. [2023-11-12 02:28:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 892 states have (on average 1.5672645739910314) internal successors, (1398), 899 states have internal predecessors, (1398), 398 states have call successors, (398), 8 states have call predecessors, (398), 8 states have return successors, (398), 391 states have call predecessors, (398), 398 states have call successors, (398) [2023-11-12 02:28:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2194 transitions. [2023-11-12 02:28:54,096 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2194 transitions. Word has length 648 [2023-11-12 02:28:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:54,098 INFO L495 AbstractCegarLoop]: Abstraction has 1299 states and 2194 transitions. [2023-11-12 02:28:54,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2194 transitions. [2023-11-12 02:28:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-12 02:28:54,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:54,120 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:54,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:54,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:54,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:54,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash 351643169, now seen corresponding path program 1 times [2023-11-12 02:28:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:54,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524154857] [2023-11-12 02:28:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:54,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:54,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836204664] [2023-11-12 02:28:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:54,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:54,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:54,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:28:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:54,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:28:54,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:28:55,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:55,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524154857] [2023-11-12 02:28:55,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:55,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836204664] [2023-11-12 02:28:55,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836204664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:55,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:28:55,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359878132] [2023-11-12 02:28:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:55,040 INFO L87 Difference]: Start difference. First operand 1299 states and 2194 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:55,229 INFO L93 Difference]: Finished difference Result 3409 states and 5688 transitions. [2023-11-12 02:28:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 648 [2023-11-12 02:28:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:55,251 INFO L225 Difference]: With dead ends: 3409 [2023-11-12 02:28:55,251 INFO L226 Difference]: Without dead ends: 2113 [2023-11-12 02:28:55,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 646 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 02:28:55,257 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 286 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:55,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1321 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:28:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2023-11-12 02:28:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2110. [2023-11-12 02:28:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 1301 states have (on average 1.4627209838585704) internal successors, (1903), 1316 states have internal predecessors, (1903), 792 states have call successors, (792), 16 states have call predecessors, (792), 16 states have return successors, (792), 777 states have call predecessors, (792), 792 states have call successors, (792) [2023-11-12 02:28:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 3487 transitions. [2023-11-12 02:28:55,627 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 3487 transitions. Word has length 648 [2023-11-12 02:28:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:55,629 INFO L495 AbstractCegarLoop]: Abstraction has 2110 states and 3487 transitions. [2023-11-12 02:28:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 3487 transitions. [2023-11-12 02:28:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-12 02:28:55,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:55,637 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:55,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:55,847 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:55,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1372711523, now seen corresponding path program 1 times [2023-11-12 02:28:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336081363] [2023-11-12 02:28:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:55,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:55,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190729254] [2023-11-12 02:28:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:55,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:55,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:28:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:56,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:28:56,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:28:56,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:28:56,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:56,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336081363] [2023-11-12 02:28:56,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:56,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190729254] [2023-11-12 02:28:56,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190729254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:56,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:56,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:28:56,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954362314] [2023-11-12 02:28:56,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:28:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:28:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:28:56,570 INFO L87 Difference]: Start difference. First operand 2110 states and 3487 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:56,797 INFO L93 Difference]: Finished difference Result 4619 states and 7548 transitions. [2023-11-12 02:28:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:28:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 648 [2023-11-12 02:28:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:56,819 INFO L225 Difference]: With dead ends: 4619 [2023-11-12 02:28:56,819 INFO L226 Difference]: Without dead ends: 2512 [2023-11-12 02:28:56,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:28:56,830 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 52 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:56,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1626 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:28:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2023-11-12 02:28:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2494. [2023-11-12 02:28:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1621 states have (on average 1.4503392967304134) internal successors, (2351), 1652 states have internal predecessors, (2351), 840 states have call successors, (840), 32 states have call predecessors, (840), 32 states have return successors, (840), 809 states have call predecessors, (840), 840 states have call successors, (840) [2023-11-12 02:28:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 4031 transitions. [2023-11-12 02:28:57,179 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 4031 transitions. Word has length 648 [2023-11-12 02:28:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:28:57,181 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 4031 transitions. [2023-11-12 02:28:57,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:28:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 4031 transitions. [2023-11-12 02:28:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-12 02:28:57,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:28:57,190 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:57,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:57,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:57,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:28:57,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -965524996, now seen corresponding path program 1 times [2023-11-12 02:28:57,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:57,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626045066] [2023-11-12 02:28:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:57,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:28:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441912900] [2023-11-12 02:28:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:57,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:57,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:57,489 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:57,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:28:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:58,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:28:58,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 4500 proven. 36 refuted. 0 times theorem prover too weak. 15664 trivial. 0 not checked. [2023-11-12 02:28:58,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 264 proven. 36 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2023-11-12 02:28:58,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:58,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626045066] [2023-11-12 02:28:58,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:28:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441912900] [2023-11-12 02:28:58,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441912900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:58,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:28:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:28:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5657152] [2023-11-12 02:28:58,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:58,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:28:58,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:28:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:28:58,752 INFO L87 Difference]: Start difference. First operand 2494 states and 4031 transitions. Second operand has 8 states, 8 states have (on average 25.625) internal successors, (205), 8 states have internal predecessors, (205), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-11-12 02:28:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:28:59,756 INFO L93 Difference]: Finished difference Result 5041 states and 8111 transitions. [2023-11-12 02:28:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:28:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 25.625) internal successors, (205), 8 states have internal predecessors, (205), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) Word has length 649 [2023-11-12 02:28:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:28:59,782 INFO L225 Difference]: With dead ends: 5041 [2023-11-12 02:28:59,782 INFO L226 Difference]: Without dead ends: 2550 [2023-11-12 02:28:59,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1290 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:28:59,795 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 660 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:28:59,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1082 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:28:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2023-11-12 02:29:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2510. [2023-11-12 02:29:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 1633 states have (on average 1.4445805266380893) internal successors, (2359), 1664 states have internal predecessors, (2359), 840 states have call successors, (840), 36 states have call predecessors, (840), 36 states have return successors, (840), 809 states have call predecessors, (840), 840 states have call successors, (840) [2023-11-12 02:29:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 4039 transitions. [2023-11-12 02:29:00,244 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 4039 transitions. Word has length 649 [2023-11-12 02:29:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:29:00,246 INFO L495 AbstractCegarLoop]: Abstraction has 2510 states and 4039 transitions. [2023-11-12 02:29:00,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.625) internal successors, (205), 8 states have internal predecessors, (205), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-11-12 02:29:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 4039 transitions. [2023-11-12 02:29:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-12 02:29:00,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:29:00,259 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:00,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:00,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:29:00,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -541878274, now seen corresponding path program 1 times [2023-11-12 02:29:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:00,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976935562] [2023-11-12 02:29:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:00,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:29:00,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388988890] [2023-11-12 02:29:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:00,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:00,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:00,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:29:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:01,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:01,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 10044 proven. 168 refuted. 0 times theorem prover too weak. 9988 trivial. 0 not checked. [2023-11-12 02:29:01,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 132 proven. 168 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2023-11-12 02:29:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976935562] [2023-11-12 02:29:02,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:29:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388988890] [2023-11-12 02:29:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388988890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:02,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:29:02,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-12 02:29:02,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024666114] [2023-11-12 02:29:02,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:02,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:29:02,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:29:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:29:02,360 INFO L87 Difference]: Start difference. First operand 2510 states and 4039 transitions. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 3 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 3 states have call predecessors, (158), 3 states have call successors, (158) [2023-11-12 02:29:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:03,343 INFO L93 Difference]: Finished difference Result 5085 states and 8143 transitions. [2023-11-12 02:29:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:29:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 3 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 3 states have call predecessors, (158), 3 states have call successors, (158) Word has length 649 [2023-11-12 02:29:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:29:03,367 INFO L225 Difference]: With dead ends: 5085 [2023-11-12 02:29:03,368 INFO L226 Difference]: Without dead ends: 2578 [2023-11-12 02:29:03,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1288 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:29:03,380 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 619 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:29:03,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1441 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:29:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2023-11-12 02:29:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2530. [2023-11-12 02:29:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 1649 states have (on average 1.4402668283808369) internal successors, (2375), 1680 states have internal predecessors, (2375), 840 states have call successors, (840), 40 states have call predecessors, (840), 40 states have return successors, (840), 809 states have call predecessors, (840), 840 states have call successors, (840) [2023-11-12 02:29:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 4055 transitions. [2023-11-12 02:29:03,766 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 4055 transitions. Word has length 649 [2023-11-12 02:29:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:29:03,768 INFO L495 AbstractCegarLoop]: Abstraction has 2530 states and 4055 transitions. [2023-11-12 02:29:03,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 3 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 3 states have call predecessors, (158), 3 states have call successors, (158) [2023-11-12 02:29:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 4055 transitions. [2023-11-12 02:29:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-12 02:29:03,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:29:03,777 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:03,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:03,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:03,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:29:03,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash 765617364, now seen corresponding path program 1 times [2023-11-12 02:29:03,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:03,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381506486] [2023-11-12 02:29:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:04,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:29:04,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637364001] [2023-11-12 02:29:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:04,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:04,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:04,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:04,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:29:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:04,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:29:04,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 1080 proven. 6 refuted. 0 times theorem prover too weak. 19114 trivial. 0 not checked. [2023-11-12 02:29:04,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 294 proven. 6 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2023-11-12 02:29:05,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:05,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381506486] [2023-11-12 02:29:05,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:29:05,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637364001] [2023-11-12 02:29:05,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637364001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:05,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:29:05,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:29:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541801259] [2023-11-12 02:29:05,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:05,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:05,321 INFO L87 Difference]: Start difference. First operand 2530 states and 4055 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-12 02:29:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:06,175 INFO L93 Difference]: Finished difference Result 4068 states and 6559 transitions. [2023-11-12 02:29:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:29:06,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 650 [2023-11-12 02:29:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:29:06,188 INFO L225 Difference]: With dead ends: 4068 [2023-11-12 02:29:06,188 INFO L226 Difference]: Without dead ends: 1541 [2023-11-12 02:29:06,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1292 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:29:06,200 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 628 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:29:06,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1082 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:29:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2023-11-12 02:29:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1515. [2023-11-12 02:29:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1071 states have (on average 1.5135387488328664) internal successors, (1621), 1086 states have internal predecessors, (1621), 422 states have call successors, (422), 21 states have call predecessors, (422), 21 states have return successors, (422), 407 states have call predecessors, (422), 422 states have call successors, (422) [2023-11-12 02:29:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2465 transitions. [2023-11-12 02:29:06,401 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2465 transitions. Word has length 650 [2023-11-12 02:29:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:29:06,402 INFO L495 AbstractCegarLoop]: Abstraction has 1515 states and 2465 transitions. [2023-11-12 02:29:06,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-12 02:29:06,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2465 transitions. [2023-11-12 02:29:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-12 02:29:06,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:29:06,412 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:06,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:06,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:29:06,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1478092052, now seen corresponding path program 1 times [2023-11-12 02:29:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:06,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722761699] [2023-11-12 02:29:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:06,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:29:06,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830134899] [2023-11-12 02:29:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:06,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:06,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:06,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:29:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:07,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:29:07,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:29:07,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:29:07,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:07,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722761699] [2023-11-12 02:29:07,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:29:07,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830134899] [2023-11-12 02:29:07,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830134899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:07,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:07,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:29:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045995442] [2023-11-12 02:29:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:29:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:29:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:29:07,435 INFO L87 Difference]: Start difference. First operand 1515 states and 2465 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:29:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:07,997 INFO L93 Difference]: Finished difference Result 4105 states and 6586 transitions. [2023-11-12 02:29:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:29:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 650 [2023-11-12 02:29:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:29:08,021 INFO L225 Difference]: With dead ends: 4105 [2023-11-12 02:29:08,021 INFO L226 Difference]: Without dead ends: 2569 [2023-11-12 02:29:08,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:29:08,028 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 298 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:29:08,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1387 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:29:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2023-11-12 02:29:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2566. [2023-11-12 02:29:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 1684 states have (on average 1.4263657957244655) internal successors, (2402), 1715 states have internal predecessors, (2402), 840 states have call successors, (840), 41 states have call predecessors, (840), 41 states have return successors, (840), 809 states have call predecessors, (840), 840 states have call successors, (840) [2023-11-12 02:29:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 4082 transitions. [2023-11-12 02:29:08,462 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 4082 transitions. Word has length 650 [2023-11-12 02:29:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:29:08,463 INFO L495 AbstractCegarLoop]: Abstraction has 2566 states and 4082 transitions. [2023-11-12 02:29:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:29:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 4082 transitions. [2023-11-12 02:29:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-12 02:29:08,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:29:08,472 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:08,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:08,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:08,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:29:08,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1900793878, now seen corresponding path program 1 times [2023-11-12 02:29:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:08,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397680617] [2023-11-12 02:29:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:08,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:29:08,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868505982] [2023-11-12 02:29:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:08,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:08,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:08,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:08,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:29:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:09,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:29:09,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:29:09,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:29:09,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397680617] [2023-11-12 02:29:09,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:29:09,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868505982] [2023-11-12 02:29:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868505982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:09,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:09,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:29:09,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371189056] [2023-11-12 02:29:09,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:09,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:29:09,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:09,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:29:09,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:29:09,539 INFO L87 Difference]: Start difference. First operand 2566 states and 4082 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:29:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:29:11,456 INFO L93 Difference]: Finished difference Result 10935 states and 17315 transitions. [2023-11-12 02:29:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:29:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 650 [2023-11-12 02:29:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:29:11,532 INFO L225 Difference]: With dead ends: 10935 [2023-11-12 02:29:11,532 INFO L226 Difference]: Without dead ends: 8372 [2023-11-12 02:29:11,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:11,542 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1724 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:29:11,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1724 Valid, 2116 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:29:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8372 states. [2023-11-12 02:29:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8372 to 6515. [2023-11-12 02:29:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6515 states, 4545 states have (on average 1.4587458745874586) internal successors, (6630), 4640 states have internal predecessors, (6630), 1864 states have call successors, (1864), 105 states have call predecessors, (1864), 105 states have return successors, (1864), 1769 states have call predecessors, (1864), 1864 states have call successors, (1864) [2023-11-12 02:29:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6515 states to 6515 states and 10358 transitions. [2023-11-12 02:29:12,441 INFO L78 Accepts]: Start accepts. Automaton has 6515 states and 10358 transitions. Word has length 650 [2023-11-12 02:29:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:29:12,443 INFO L495 AbstractCegarLoop]: Abstraction has 6515 states and 10358 transitions. [2023-11-12 02:29:12,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:29:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6515 states and 10358 transitions. [2023-11-12 02:29:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-12 02:29:12,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:29:12,462 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:12,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:29:12,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:29:12,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1483397272, now seen corresponding path program 1 times [2023-11-12 02:29:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811509391] [2023-11-12 02:29:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:12,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:29:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077386632] [2023-11-12 02:29:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:12,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:12,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:12,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5846acd3-d5ba-4091-a87e-293119233733/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:29:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:13,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:29:13,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 8794 proven. 93 refuted. 0 times theorem prover too weak. 11313 trivial. 0 not checked. [2023-11-12 02:29:15,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:20,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811509391] [2023-11-12 02:29:20,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:29:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077386632] [2023-11-12 02:29:20,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077386632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:20,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:29:20,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-12 02:29:20,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857047788] [2023-11-12 02:29:20,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:20,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:29:20,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:29:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:29:20,320 INFO L87 Difference]: Start difference. First operand 6515 states and 10358 transitions. Second operand has 9 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 2 states have call successors, (101), 2 states have call predecessors, (101), 3 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-12 02:29:23,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:29:28,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:29:30,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]