./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme --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 761fb2e99ab9251ac7947ba46fb99974160692ea29cab55c1f186335f208c9ce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:27,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:27,675 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:53:27,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:27,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:27,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:27,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:27,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:27,710 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:27,710 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:27,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:27,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:27,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:27,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:27,714 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:27,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:27,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:53:27,717 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:27,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:27,718 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:27,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:27,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:53:27,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:27,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:53:27,721 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:27,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:53:27,722 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:27,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:27,723 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:27,724 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:27,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:27,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:27,725 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:27,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:27,726 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:53:27,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:27,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:27,728 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:27,728 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:27,729 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:53:27,729 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:27,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:27,731 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_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 761fb2e99ab9251ac7947ba46fb99974160692ea29cab55c1f186335f208c9ce [2023-11-26 11:53:28,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:28,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:28,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:28,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:28,078 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:28,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i [2023-11-26 11:53:31,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:31,509 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:31,510 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i [2023-11-26 11:53:31,526 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/data/a61a5af2e/d80c287b512e4bba8461741f1a1bee0c/FLAG18ffeee3c [2023-11-26 11:53:31,548 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/data/a61a5af2e/d80c287b512e4bba8461741f1a1bee0c [2023-11-26 11:53:31,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:31,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:31,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:31,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:31,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:31,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:31" (1/1) ... [2023-11-26 11:53:31,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747d61e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:31, skipping insertion in model container [2023-11-26 11:53:31,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:31" (1/1) ... [2023-11-26 11:53:31,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:31,807 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_4581872e-b20b-4352-a19f-05f501870f47/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i[919,932] [2023-11-26 11:53:31,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:31,919 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:31,933 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_4581872e-b20b-4352-a19f-05f501870f47/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i[919,932] [2023-11-26 11:53:32,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:32,038 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:32,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32 WrapperNode [2023-11-26 11:53:32,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:32,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:32,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:32,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:32,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,158 INFO L138 Inliner]: procedures = 26, calls = 72, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 345 [2023-11-26 11:53:32,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:32,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:32,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:32,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:32,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,202 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:53:32,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:32,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:32,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:32,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:32,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (1/1) ... [2023-11-26 11:53:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:32,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:32,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:53:32,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:53:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:32,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:32,500 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:32,503 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:33,265 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:33,343 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:33,343 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:53:33,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:33 BoogieIcfgContainer [2023-11-26 11:53:33,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:33,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:33,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:33,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:33,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:31" (1/3) ... [2023-11-26 11:53:33,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3821af09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:33, skipping insertion in model container [2023-11-26 11:53:33,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:32" (2/3) ... [2023-11-26 11:53:33,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3821af09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:33, skipping insertion in model container [2023-11-26 11:53:33,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:33" (3/3) ... [2023-11-26 11:53:33,358 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-cn_file-16.i [2023-11-26 11:53:33,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:33,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:53:33,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:33,452 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;@31c67465, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:33,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:53:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 76 states have internal predecessors, (106), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-26 11:53:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:53:33,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:33,513 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:33,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:33,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1391943842, now seen corresponding path program 1 times [2023-11-26 11:53:33,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:33,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635345114] [2023-11-26 11:53:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:33,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:33,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635345114] [2023-11-26 11:53:33,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:53:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054974921] [2023-11-26 11:53:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:33,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:33,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:33,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:33,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:53:34,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2023-11-26 11:53:34,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054974921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:34,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:34,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433384266] [2023-11-26 11:53:34,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:34,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:53:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:53:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:53:34,402 INFO L87 Difference]: Start difference. First operand has 137 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 76 states have internal predecessors, (106), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) Second operand has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-26 11:53:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:34,472 INFO L93 Difference]: Finished difference Result 271 states and 505 transitions. [2023-11-26 11:53:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:53:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 2 states have call successors, (59) Word has length 353 [2023-11-26 11:53:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:34,490 INFO L225 Difference]: With dead ends: 271 [2023-11-26 11:53:34,490 INFO L226 Difference]: Without dead ends: 135 [2023-11-26 11:53:34,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:53:34,506 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:34,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 215 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-26 11:53:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-26 11:53:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-26 11:53:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 219 transitions. [2023-11-26 11:53:34,613 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 219 transitions. Word has length 353 [2023-11-26 11:53:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:34,614 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 219 transitions. [2023-11-26 11:53:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-26 11:53:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 219 transitions. [2023-11-26 11:53:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:53:34,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:34,626 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:34,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:34,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:34,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:34,833 INFO L85 PathProgramCache]: Analyzing trace with hash 453801820, now seen corresponding path program 1 times [2023-11-26 11:53:34,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:34,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183210354] [2023-11-26 11:53:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:35,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:35,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486147108] [2023-11-26 11:53:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:35,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:35,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:35,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:35,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:35,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-26 11:53:35,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:35,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183210354] [2023-11-26 11:53:35,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486147108] [2023-11-26 11:53:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486147108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:35,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:35,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:53:35,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545475476] [2023-11-26 11:53:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:53:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:53:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:53:35,953 INFO L87 Difference]: Start difference. First operand 135 states and 219 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:53:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:36,521 INFO L93 Difference]: Finished difference Result 377 states and 611 transitions. [2023-11-26 11:53:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:53:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 353 [2023-11-26 11:53:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:36,536 INFO L225 Difference]: With dead ends: 377 [2023-11-26 11:53:36,536 INFO L226 Difference]: Without dead ends: 243 [2023-11-26 11:53:36,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:53:36,542 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 422 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:36,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1055 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:53:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-26 11:53:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2023-11-26 11:53:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 110 states have (on average 1.481818181818182) internal successors, (163), 110 states have internal predecessors, (163), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-26 11:53:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 281 transitions. [2023-11-26 11:53:36,605 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 281 transitions. Word has length 353 [2023-11-26 11:53:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:36,611 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 281 transitions. [2023-11-26 11:53:36,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:53:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 281 transitions. [2023-11-26 11:53:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:53:36,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:36,624 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:36,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:36,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:36,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:36,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:36,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1847020770, now seen corresponding path program 1 times [2023-11-26 11:53:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:36,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033810850] [2023-11-26 11:53:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:36,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599761969] [2023-11-26 11:53:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:36,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:36,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:37,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:37,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-26 11:53:37,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:37,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:37,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033810850] [2023-11-26 11:53:37,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:37,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599761969] [2023-11-26 11:53:37,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599761969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:37,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:37,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:53:37,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521454576] [2023-11-26 11:53:37,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:53:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:53:37,300 INFO L87 Difference]: Start difference. First operand 171 states and 281 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:53:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:37,568 INFO L93 Difference]: Finished difference Result 538 states and 871 transitions. [2023-11-26 11:53:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:53:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 353 [2023-11-26 11:53:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:37,574 INFO L225 Difference]: With dead ends: 538 [2023-11-26 11:53:37,575 INFO L226 Difference]: Without dead ends: 368 [2023-11-26 11:53:37,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:37,577 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 341 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:37,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1130 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:53:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-26 11:53:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 347. [2023-11-26 11:53:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 277 states have (on average 1.5776173285198556) internal successors, (437), 279 states have internal predecessors, (437), 65 states have call successors, (65), 4 states have call predecessors, (65), 4 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:53:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 567 transitions. [2023-11-26 11:53:37,615 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 567 transitions. Word has length 353 [2023-11-26 11:53:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:37,617 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 567 transitions. [2023-11-26 11:53:37,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:53:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 567 transitions. [2023-11-26 11:53:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:53:37,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:37,626 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:37,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:37,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:37,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:37,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2035727142, now seen corresponding path program 1 times [2023-11-26 11:53:37,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900517012] [2023-11-26 11:53:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:37,894 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621617276] [2023-11-26 11:53:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:37,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:37,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:38,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:38,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-26 11:53:38,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:38,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:38,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900517012] [2023-11-26 11:53:38,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:38,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621617276] [2023-11-26 11:53:38,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621617276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:38,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:53:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796387890] [2023-11-26 11:53:38,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:53:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:53:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:53:38,716 INFO L87 Difference]: Start difference. First operand 347 states and 567 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:53:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:39,276 INFO L93 Difference]: Finished difference Result 947 states and 1548 transitions. [2023-11-26 11:53:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:53:39,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 353 [2023-11-26 11:53:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:39,284 INFO L225 Difference]: With dead ends: 947 [2023-11-26 11:53:39,285 INFO L226 Difference]: Without dead ends: 601 [2023-11-26 11:53:39,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:53:39,287 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 289 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:39,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1418 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:53:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-11-26 11:53:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 343. [2023-11-26 11:53:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 273 states have (on average 1.5714285714285714) internal successors, (429), 275 states have internal predecessors, (429), 65 states have call successors, (65), 4 states have call predecessors, (65), 4 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-26 11:53:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 559 transitions. [2023-11-26 11:53:39,345 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 559 transitions. Word has length 353 [2023-11-26 11:53:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:39,347 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 559 transitions. [2023-11-26 11:53:39,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:53:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 559 transitions. [2023-11-26 11:53:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:53:39,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:39,356 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:39,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:39,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:39,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:39,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1981034276, now seen corresponding path program 1 times [2023-11-26 11:53:39,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:39,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685139646] [2023-11-26 11:53:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:39,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:39,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448400318] [2023-11-26 11:53:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:39,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:39,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:39,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:53:39,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 1500 proven. 153 refuted. 0 times theorem prover too weak. 5191 trivial. 0 not checked. [2023-11-26 11:53:42,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 21 proven. 153 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-26 11:53:45,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685139646] [2023-11-26 11:53:45,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448400318] [2023-11-26 11:53:45,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448400318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:45,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:45,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2023-11-26 11:53:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922281307] [2023-11-26 11:53:45,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:45,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:53:45,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:45,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:53:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:53:45,280 INFO L87 Difference]: Start difference. First operand 343 states and 559 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-26 11:53:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:57,871 INFO L93 Difference]: Finished difference Result 3730 states and 6126 transitions. [2023-11-26 11:53:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-11-26 11:53:57,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) Word has length 353 [2023-11-26 11:53:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:57,900 INFO L225 Difference]: With dead ends: 3730 [2023-11-26 11:53:57,900 INFO L226 Difference]: Without dead ends: 3388 [2023-11-26 11:53:57,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9654 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4498, Invalid=18152, Unknown=0, NotChecked=0, Total=22650 [2023-11-26 11:53:57,912 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 2919 mSDsluCounter, 4172 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2976 SdHoareTripleChecker+Valid, 4501 SdHoareTripleChecker+Invalid, 4608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:57,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2976 Valid, 4501 Invalid, 4608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [737 Valid, 3871 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-26 11:53:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2023-11-26 11:53:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 1037. [2023-11-26 11:53:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 830 states have (on average 1.5843373493975903) internal successors, (1315), 836 states have internal predecessors, (1315), 195 states have call successors, (195), 11 states have call predecessors, (195), 11 states have return successors, (195), 189 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-26 11:53:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1705 transitions. [2023-11-26 11:53:58,149 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1705 transitions. Word has length 353 [2023-11-26 11:53:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:58,150 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1705 transitions. [2023-11-26 11:53:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-26 11:53:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1705 transitions. [2023-11-26 11:53:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:53:58,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:58,156 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:58,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:58,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:58,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash -175595942, now seen corresponding path program 1 times [2023-11-26 11:53:58,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:58,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751468242] [2023-11-26 11:53:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:58,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:58,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:58,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749221011] [2023-11-26 11:53:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:58,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:58,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:58,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:58,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:53:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:58,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 11:53:58,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 1389 proven. 309 refuted. 0 times theorem prover too weak. 5146 trivial. 0 not checked. [2023-11-26 11:54:01,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-26 11:54:03,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751468242] [2023-11-26 11:54:03,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749221011] [2023-11-26 11:54:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749221011] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:03,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-26 11:54:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926463300] [2023-11-26 11:54:03,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:03,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:54:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:54:03,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:54:03,788 INFO L87 Difference]: Start difference. First operand 1037 states and 1705 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:54:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:05,633 INFO L93 Difference]: Finished difference Result 2862 states and 4702 transitions. [2023-11-26 11:54:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:54:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 353 [2023-11-26 11:54:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:05,649 INFO L225 Difference]: With dead ends: 2862 [2023-11-26 11:54:05,650 INFO L226 Difference]: Without dead ends: 2195 [2023-11-26 11:54:05,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:54:05,653 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 371 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:05,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1381 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:54:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2023-11-26 11:54:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1042. [2023-11-26 11:54:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 835 states have (on average 1.5844311377245508) internal successors, (1323), 841 states have internal predecessors, (1323), 195 states have call successors, (195), 11 states have call predecessors, (195), 11 states have return successors, (195), 189 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-26 11:54:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1713 transitions. [2023-11-26 11:54:05,787 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1713 transitions. Word has length 353 [2023-11-26 11:54:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:05,789 INFO L495 AbstractCegarLoop]: Abstraction has 1042 states and 1713 transitions. [2023-11-26 11:54:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:54:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1713 transitions. [2023-11-26 11:54:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-26 11:54:05,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:05,793 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:54:06,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:06,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1186713192, now seen corresponding path program 1 times [2023-11-26 11:54:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:06,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885355721] [2023-11-26 11:54:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:06,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:06,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507111956] [2023-11-26 11:54:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:06,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:06,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:06,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:54:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:54:06,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 1128 proven. 159 refuted. 0 times theorem prover too weak. 5557 trivial. 0 not checked. [2023-11-26 11:54:08,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-26 11:54:11,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885355721] [2023-11-26 11:54:11,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:11,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507111956] [2023-11-26 11:54:11,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507111956] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:11,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:11,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2023-11-26 11:54:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117926858] [2023-11-26 11:54:11,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:11,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:54:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:54:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:54:11,358 INFO L87 Difference]: Start difference. First operand 1042 states and 1713 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 2 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-26 11:54:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:15,631 INFO L93 Difference]: Finished difference Result 3494 states and 5787 transitions. [2023-11-26 11:54:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 11:54:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 2 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 353 [2023-11-26 11:54:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:15,650 INFO L225 Difference]: With dead ends: 3494 [2023-11-26 11:54:15,650 INFO L226 Difference]: Without dead ends: 2453 [2023-11-26 11:54:15,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2023-11-26 11:54:15,658 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 1124 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:15,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1841 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-26 11:54:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2023-11-26 11:54:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1052. [2023-11-26 11:54:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 845 states have (on average 1.5846153846153845) internal successors, (1339), 851 states have internal predecessors, (1339), 195 states have call successors, (195), 11 states have call predecessors, (195), 11 states have return successors, (195), 189 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-26 11:54:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1729 transitions. [2023-11-26 11:54:15,802 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1729 transitions. Word has length 353 [2023-11-26 11:54:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:15,803 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1729 transitions. [2023-11-26 11:54:15,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 2 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-26 11:54:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1729 transitions. [2023-11-26 11:54:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-26 11:54:15,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:15,808 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:15,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:16,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:54:16,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:16,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1376625624, now seen corresponding path program 1 times [2023-11-26 11:54:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:16,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141663872] [2023-11-26 11:54:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:16,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:16,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786358726] [2023-11-26 11:54:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:16,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:16,064 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:16,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:54:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:16,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:54:16,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-26 11:54:17,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:17,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141663872] [2023-11-26 11:54:17,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786358726] [2023-11-26 11:54:17,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786358726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:17,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:17,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:54:17,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339032443] [2023-11-26 11:54:17,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:17,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:54:17,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:17,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:54:17,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:54:17,247 INFO L87 Difference]: Start difference. First operand 1052 states and 1729 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:54:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:18,006 INFO L93 Difference]: Finished difference Result 2608 states and 4289 transitions. [2023-11-26 11:54:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:54:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 354 [2023-11-26 11:54:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:18,021 INFO L225 Difference]: With dead ends: 2608 [2023-11-26 11:54:18,021 INFO L226 Difference]: Without dead ends: 1557 [2023-11-26 11:54:18,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:54:18,027 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 368 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:18,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1222 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:54:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2023-11-26 11:54:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1124. [2023-11-26 11:54:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 917 states have (on average 1.5757906215921482) internal successors, (1445), 923 states have internal predecessors, (1445), 195 states have call successors, (195), 11 states have call predecessors, (195), 11 states have return successors, (195), 189 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-26 11:54:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1835 transitions. [2023-11-26 11:54:18,166 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1835 transitions. Word has length 354 [2023-11-26 11:54:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:18,167 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1835 transitions. [2023-11-26 11:54:18,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-26 11:54:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1835 transitions. [2023-11-26 11:54:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-26 11:54:18,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:18,171 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:18,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:54:18,383 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:18,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 617519082, now seen corresponding path program 1 times [2023-11-26 11:54:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:18,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001571375] [2023-11-26 11:54:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:18,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18595661] [2023-11-26 11:54:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:18,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:18,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:18,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4581872e-b20b-4352-a19f-05f501870f47/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process