./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c --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_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/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_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/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_2b9da65a-00bf-4427-964e-9e77ea7d28f9/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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:41:22,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:41:22,098 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:41:22,104 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:41:22,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:41:22,130 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:41:22,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:41:22,132 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:41:22,133 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:41:22,134 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:41:22,134 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:41:22,135 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:41:22,136 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:41:22,137 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:41:22,137 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:41:22,138 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:41:22,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:41:22,139 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:41:22,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:41:22,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:41:22,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:41:22,148 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:41:22,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:41:22,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:41:22,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:41:22,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:41:22,153 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:41:22,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:41:22,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:41:22,157 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:41:22,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:41:22,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:22,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:41:22,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:41:22,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:41:22,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:41:22,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:41:22,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:41:22,166 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:41:22,167 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:41:22,168 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:41:22,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:41:22,169 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_2b9da65a-00bf-4427-964e-9e77ea7d28f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 [2023-11-26 10:41:22,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:41:22,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:41:22,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:41:22,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:41:22,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:41:22,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2023-11-26 10:41:25,669 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:41:25,980 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:41:25,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2023-11-26 10:41:25,993 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/data/89bbc1efe/22dee1f141e04b0fa8007d209b8464b3/FLAG810f315c4 [2023-11-26 10:41:26,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/data/89bbc1efe/22dee1f141e04b0fa8007d209b8464b3 [2023-11-26 10:41:26,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:41:26,025 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:41:26,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:26,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:41:26,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:41:26,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,036 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbbdea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26, skipping insertion in model container [2023-11-26 10:41:26,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:26,323 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_2b9da65a-00bf-4427-964e-9e77ea7d28f9/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c[526,539] [2023-11-26 10:41:26,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:26,358 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:26,378 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_2b9da65a-00bf-4427-964e-9e77ea7d28f9/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c[526,539] [2023-11-26 10:41:26,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:26,415 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:26,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26 WrapperNode [2023-11-26 10:41:26,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:26,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:26,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:26,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:26,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,439 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,476 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-26 10:41:26,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:26,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:26,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:26,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:26,490 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,501 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,514 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-11-26 10:41:26,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,518 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,521 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:26,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:26,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:26,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:26,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (1/1) ... [2023-11-26 10:41:26,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:26,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:26,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:26,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:41:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:41:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:41:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:26,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:41:26,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:41:26,749 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:26,752 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:27,023 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:27,065 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:27,066 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:41:27,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:27 BoogieIcfgContainer [2023-11-26 10:41:27,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:27,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:27,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:27,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:27,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:26" (1/3) ... [2023-11-26 10:41:27,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2068f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:27, skipping insertion in model container [2023-11-26 10:41:27,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:26" (2/3) ... [2023-11-26 10:41:27,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2068f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:27, skipping insertion in model container [2023-11-26 10:41:27,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:27" (3/3) ... [2023-11-26 10:41:27,084 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2023-11-26 10:41:27,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:27,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:41:27,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:27,184 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;@133828fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:27,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:41:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 10:41:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:41:27,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:27,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:27,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:27,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1830609328, now seen corresponding path program 1 times [2023-11-26 10:41:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643645389] [2023-11-26 10:41:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:27,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:27,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643645389] [2023-11-26 10:41:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643645389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:27,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:27,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448301959] [2023-11-26 10:41:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:41:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:41:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:41:27,432 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:27,468 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2023-11-26 10:41:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:41:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-26 10:41:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:27,479 INFO L225 Difference]: With dead ends: 44 [2023-11-26 10:41:27,479 INFO L226 Difference]: Without dead ends: 21 [2023-11-26 10:41:27,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 10:41:27,486 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:27,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:41:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-26 10:41:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-26 10:41:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:41:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2023-11-26 10:41:27,530 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 8 [2023-11-26 10:41:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:27,530 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2023-11-26 10:41:27,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2023-11-26 10:41:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:41:27,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:27,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:27,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:27,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash -55601966, now seen corresponding path program 1 times [2023-11-26 10:41:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:27,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069940876] [2023-11-26 10:41:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069940876] [2023-11-26 10:41:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069940876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:27,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:27,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:41:27,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281846914] [2023-11-26 10:41:27,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:27,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:27,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:41:27,782 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:27,862 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-11-26 10:41:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-26 10:41:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:27,864 INFO L225 Difference]: With dead ends: 34 [2023-11-26 10:41:27,864 INFO L226 Difference]: Without dead ends: 32 [2023-11-26 10:41:27,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:27,867 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:27,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:41:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-26 10:41:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-11-26 10:41:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:41:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-26 10:41:27,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 8 [2023-11-26 10:41:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:27,887 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-26 10:41:27,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-26 10:41:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:41:27,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:27,889 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:27,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:27,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1587104181, now seen corresponding path program 1 times [2023-11-26 10:41:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:27,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203448338] [2023-11-26 10:41:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:41:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203448338] [2023-11-26 10:41:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203448338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:28,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:28,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:41:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338793163] [2023-11-26 10:41:28,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:28,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:41:28,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:41:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:41:28,092 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:28,160 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-11-26 10:41:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 10:41:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:28,162 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:41:28,163 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 10:41:28,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:28,165 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:28,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 78 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:41:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 10:41:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-11-26 10:41:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:41:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-26 10:41:28,178 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2023-11-26 10:41:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:28,178 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-26 10:41:28,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:41:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-26 10:41:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:41:28,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:28,180 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:28,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:41:28,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:28,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1972613170, now seen corresponding path program 1 times [2023-11-26 10:41:28,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:28,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603930772] [2023-11-26 10:41:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:28,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:28,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:28,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316574130] [2023-11-26 10:41:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:28,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:28,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:41:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:28,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 10:41:28,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:28,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:28,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603930772] [2023-11-26 10:41:28,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316574130] [2023-11-26 10:41:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316574130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:28,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-26 10:41:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812689626] [2023-11-26 10:41:28,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:41:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:41:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:41:28,821 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:41:33,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:41:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:33,352 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-11-26 10:41:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2023-11-26 10:41:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:33,356 INFO L225 Difference]: With dead ends: 64 [2023-11-26 10:41:33,356 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 10:41:33,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:41:33,359 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:33,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-11-26 10:41:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 10:41:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-26 10:41:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-26 10:41:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-11-26 10:41:33,377 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 18 [2023-11-26 10:41:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:33,377 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-11-26 10:41:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:41:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-11-26 10:41:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:41:33,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:33,379 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:33,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:41:33,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:33,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:33,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1810344840, now seen corresponding path program 1 times [2023-11-26 10:41:33,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:33,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309549482] [2023-11-26 10:41:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:33,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:33,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565381396] [2023-11-26 10:41:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:33,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:33,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:33,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:41:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:33,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:41:33,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:41:33,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:41:33,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:33,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309549482] [2023-11-26 10:41:33,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:33,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565381396] [2023-11-26 10:41:33,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565381396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:33,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:33,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-26 10:41:33,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889577830] [2023-11-26 10:41:33,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:33,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:41:33,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:41:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:41:33,974 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:41:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:34,138 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-11-26 10:41:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:41:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-11-26 10:41:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:34,140 INFO L225 Difference]: With dead ends: 65 [2023-11-26 10:41:34,141 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:41:34,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:41:34,143 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:34,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:41:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:41:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-11-26 10:41:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-26 10:41:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-11-26 10:41:34,160 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 25 [2023-11-26 10:41:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:34,160 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-11-26 10:41:34,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 10:41:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-11-26 10:41:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 10:41:34,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:34,163 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:34,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:34,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:34,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:34,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1460518785, now seen corresponding path program 1 times [2023-11-26 10:41:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896541339] [2023-11-26 10:41:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:34,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:34,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932647049] [2023-11-26 10:41:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:34,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:34,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:34,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:41:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:34,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 10:41:34,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-26 10:41:35,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-26 10:41:36,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896541339] [2023-11-26 10:41:36,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932647049] [2023-11-26 10:41:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932647049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:36,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:36,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-26 10:41:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594357583] [2023-11-26 10:41:36,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:36,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:41:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:41:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:41:36,846 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-26 10:41:53,666 WARN L293 SmtUtils]: Spent 16.47s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-26 10:41:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:41:54,719 INFO L93 Difference]: Finished difference Result 141 states and 192 transitions. [2023-11-26 10:41:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:41:54,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 55 [2023-11-26 10:41:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:41:54,722 INFO L225 Difference]: With dead ends: 141 [2023-11-26 10:41:54,722 INFO L226 Difference]: Without dead ends: 110 [2023-11-26 10:41:54,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:41:54,724 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:41:54,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 168 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:41:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-26 10:41:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2023-11-26 10:41:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 70 states have internal predecessors, (76), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 24 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-26 10:41:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2023-11-26 10:41:54,772 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 55 [2023-11-26 10:41:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:41:54,772 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2023-11-26 10:41:54,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-26 10:41:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2023-11-26 10:41:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 10:41:54,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:41:54,776 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:54,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:54,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:54,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:41:54,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash -814878683, now seen corresponding path program 1 times [2023-11-26 10:41:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:54,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219042517] [2023-11-26 10:41:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:55,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:41:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092402052] [2023-11-26 10:41:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:55,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:55,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:55,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:41:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:55,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:41:55,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-26 10:41:55,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-26 10:41:56,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:56,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219042517] [2023-11-26 10:41:56,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:41:56,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092402052] [2023-11-26 10:41:56,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092402052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:56,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:41:56,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-26 10:41:56,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160383680] [2023-11-26 10:41:56,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:56,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:41:56,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:41:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:41:56,158 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-26 10:42:00,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:42:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:00,680 INFO L93 Difference]: Finished difference Result 160 states and 209 transitions. [2023-11-26 10:42:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:42:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 66 [2023-11-26 10:42:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:00,685 INFO L225 Difference]: With dead ends: 160 [2023-11-26 10:42:00,686 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 10:42:00,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:42:00,689 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:00,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 168 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-26 10:42:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 10:42:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2023-11-26 10:42:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 65 states have internal predecessors, (71), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 10:42:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-11-26 10:42:00,737 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 66 [2023-11-26 10:42:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:00,737 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-11-26 10:42:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-26 10:42:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-11-26 10:42:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 10:42:00,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:00,740 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:00,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:00,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:42:00,947 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:00,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1399001704, now seen corresponding path program 1 times [2023-11-26 10:42:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105035230] [2023-11-26 10:42:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:00,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860830819] [2023-11-26 10:42:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:00,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:00,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:00,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:42:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:01,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 10:42:01,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-26 10:42:01,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-26 10:42:01,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:01,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105035230] [2023-11-26 10:42:01,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:01,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860830819] [2023-11-26 10:42:01,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860830819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:01,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:01,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-26 10:42:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251491362] [2023-11-26 10:42:01,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:01,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:42:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:42:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:42:01,847 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-26 10:42:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:02,279 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2023-11-26 10:42:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:42:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-11-26 10:42:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:02,282 INFO L225 Difference]: With dead ends: 116 [2023-11-26 10:42:02,282 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 10:42:02,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:42:02,283 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:02,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 158 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:42:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 10:42:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-26 10:42:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 10:42:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-11-26 10:42:02,318 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 71 [2023-11-26 10:42:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:02,318 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-11-26 10:42:02,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-26 10:42:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-11-26 10:42:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 10:42:02,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:02,321 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:02,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:42:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:42:02,527 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:02,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2065528550, now seen corresponding path program 1 times [2023-11-26 10:42:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:02,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971102895] [2023-11-26 10:42:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:02,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866772066] [2023-11-26 10:42:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:02,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:02,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:02,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:02,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:42:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:02,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:42:02,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-26 10:42:02,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:02,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:02,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971102895] [2023-11-26 10:42:02,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:42:02,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866772066] [2023-11-26 10:42:02,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866772066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:02,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:02,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:42:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930448362] [2023-11-26 10:42:02,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:02,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:02,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:02,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:02,820 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-26 10:42:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:02,966 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-11-26 10:42:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:42:02,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 85 [2023-11-26 10:42:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:02,973 INFO L225 Difference]: With dead ends: 115 [2023-11-26 10:42:02,973 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 10:42:02,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:42:02,976 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:02,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 10:42:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-11-26 10:42:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 10:42:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-26 10:42:03,020 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 85 [2023-11-26 10:42:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:03,021 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-26 10:42:03,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-26 10:42:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-26 10:42:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 10:42:03,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:03,023 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:03,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:42:03,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:42:03,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:42:03,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash -376584808, now seen corresponding path program 2 times [2023-11-26 10:42:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753485831] [2023-11-26 10:42:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:03,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:42:03,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245277186] [2023-11-26 10:42:03,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:42:03,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:03,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:03,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:03,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9da65a-00bf-4427-964e-9e77ea7d28f9/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:42:03,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:42:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:42:03,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-26 10:42:03,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-26 10:42:03,844 INFO L327 TraceCheckSpWp]: Computing backward predicates...