./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/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_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/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_5f56daaa-925d-42ba-a584-06e123fa176b/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 698c604312f3eb09bef7f8f6e092d43de99877a411ec8f3c76598811466d02b7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:58:46,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:58:46,651 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:58:46,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:58:46,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:58:46,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:58:46,705 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:58:46,705 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:58:46,706 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:58:46,707 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:58:46,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:58:46,709 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:58:46,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:58:46,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:58:46,711 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:58:46,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:58:46,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:58:46,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:58:46,714 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:58:46,714 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:58:46,715 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:58:46,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:58:46,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:58:46,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:58:46,717 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:58:46,718 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:58:46,719 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:58:46,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:58:46,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:58:46,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:58:46,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:58:46,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:46,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:58:46,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:58:46,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:58:46,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:58:46,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:58:46,724 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:58:46,725 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:58:46,725 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:58:46,725 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:58:46,726 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:58:46,726 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_5f56daaa-925d-42ba-a584-06e123fa176b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 698c604312f3eb09bef7f8f6e092d43de99877a411ec8f3c76598811466d02b7 [2023-11-26 11:58:47,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:58:47,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:58:47,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:58:47,064 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:58:47,064 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:58:47,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i [2023-11-26 11:58:50,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:58:50,569 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:58:50,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i [2023-11-26 11:58:50,581 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/data/2f6d57520/cc5fdcaef4194a73a92715b31356540b/FLAG64105f74e [2023-11-26 11:58:50,599 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/data/2f6d57520/cc5fdcaef4194a73a92715b31356540b [2023-11-26 11:58:50,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:58:50,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:58:50,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:50,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:58:50,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:58:50,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d54a524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50, skipping insertion in model container [2023-11-26 11:58:50,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,648 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:58:50,850 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_5f56daaa-925d-42ba-a584-06e123fa176b/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i[951,964] [2023-11-26 11:58:50,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:50,890 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:58:50,910 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_5f56daaa-925d-42ba-a584-06e123fa176b/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound50.i[951,964] [2023-11-26 11:58:50,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:58:50,943 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:58:50,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50 WrapperNode [2023-11-26 11:58:50,944 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:58:50,946 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:50,946 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:58:50,946 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:58:50,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,965 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:50,989 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2023-11-26 11:58:50,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:58:50,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:58:50,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:58:50,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:58:51,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,014 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,032 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:58:51,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,050 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,058 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:58:51,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:58:51,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:58:51,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:58:51,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (1/1) ... [2023-11-26 11:58:51,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:58:51,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:51,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:58:51,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:58:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:58:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:58:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:58:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:58:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:58:51,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:58:51,232 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:58:51,235 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:58:51,407 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:58:51,432 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:58:51,432 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:58:51,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:51 BoogieIcfgContainer [2023-11-26 11:58:51,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:58:51,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:58:51,437 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:58:51,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:58:51,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:58:50" (1/3) ... [2023-11-26 11:58:51,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeda0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:51, skipping insertion in model container [2023-11-26 11:58:51,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:58:50" (2/3) ... [2023-11-26 11:58:51,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeda0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:58:51, skipping insertion in model container [2023-11-26 11:58:51,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:58:51" (3/3) ... [2023-11-26 11:58:51,444 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound50.i [2023-11-26 11:58:51,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:58:51,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:58:51,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:58:51,526 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;@11f21763, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:58:51,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:58:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:58:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 11:58:51,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:51,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:51,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:51,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 334653711, now seen corresponding path program 1 times [2023-11-26 11:58:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:51,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819419045] [2023-11-26 11:58:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:51,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819419045] [2023-11-26 11:58:51,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:58:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543415581] [2023-11-26 11:58:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:51,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:51,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:51,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:51,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:58:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:51,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:58:51,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:51,815 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 11:58:51,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543415581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:51,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:58:51,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489827738] [2023-11-26 11:58:51,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:58:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:58:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:51,858 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 11:58:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:51,895 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2023-11-26 11:58:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:58:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2023-11-26 11:58:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:51,909 INFO L225 Difference]: With dead ends: 34 [2023-11-26 11:58:51,910 INFO L226 Difference]: Without dead ends: 16 [2023-11-26 11:58:51,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:58:51,919 INFO L413 NwaCegarLoop]: 19 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, 19 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 11:58:51,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:58:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-26 11:58:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-26 11:58:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 11:58:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-26 11:58:51,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2023-11-26 11:58:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:51,966 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-26 11:58:51,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 11:58:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-26 11:58:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:58:51,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:51,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:52,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:58:52,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:52,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash -401566674, now seen corresponding path program 1 times [2023-11-26 11:58:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:52,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299950806] [2023-11-26 11:58:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:52,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:52,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001131041] [2023-11-26 11:58:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:52,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:52,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:52,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:52,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:58:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:52,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:58:52,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:52,570 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 11:58:52,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:52,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299950806] [2023-11-26 11:58:52,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001131041] [2023-11-26 11:58:52,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001131041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:52,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:52,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:58:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855766106] [2023-11-26 11:58:52,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:52,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:58:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:58:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:58:52,577 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 11:58:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:52,660 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-26 11:58:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:58:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2023-11-26 11:58:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:52,662 INFO L225 Difference]: With dead ends: 28 [2023-11-26 11:58:52,662 INFO L226 Difference]: Without dead ends: 25 [2023-11-26 11:58:52,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:52,664 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:52,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:58:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-26 11:58:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-26 11:58:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:58:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-26 11:58:52,673 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2023-11-26 11:58:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:52,674 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-26 11:58:52,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 11:58:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-26 11:58:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:58:52,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:52,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:58:52,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:52,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:52,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:52,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1504476233, now seen corresponding path program 1 times [2023-11-26 11:58:52,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:52,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310023091] [2023-11-26 11:58:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:52,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:52,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121470147] [2023-11-26 11:58:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:52,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:52,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:52,906 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:52,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:58:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:52,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:58:52,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:58:53,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:53,414 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 11:58:53,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310023091] [2023-11-26 11:58:53,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121470147] [2023-11-26 11:58:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121470147] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:58:53,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:58:53,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-11-26 11:58:53,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361034547] [2023-11-26 11:58:53,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:53,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:58:53,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:58:53,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:58:53,421 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 11:58:57,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 11:59:01,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 11:59:05,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 11:59:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:05,665 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-26 11:59:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:05,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 12 [2023-11-26 11:59:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:05,668 INFO L225 Difference]: With dead ends: 39 [2023-11-26 11:59:05,668 INFO L226 Difference]: Without dead ends: 37 [2023-11-26 11:59:05,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:05,670 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:05,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-11-26 11:59:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-26 11:59:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-11-26 11:59:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:59:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-26 11:59:05,693 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2023-11-26 11:59:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:05,698 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-26 11:59:05,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 11:59:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-26 11:59:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:59:05,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:05,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:05,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:05,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:05,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:05,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1989427041, now seen corresponding path program 1 times [2023-11-26 11:59:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158975432] [2023-11-26 11:59:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:05,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:05,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142589679] [2023-11-26 11:59:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:05,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:05,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:05,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:06,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:06,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:06,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:06,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:06,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158975432] [2023-11-26 11:59:06,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142589679] [2023-11-26 11:59:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142589679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:06,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:06,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:06,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499547174] [2023-11-26 11:59:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:06,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:06,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:06,044 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 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 11:59:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:06,072 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-26 11:59:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:06,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 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 18 [2023-11-26 11:59:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:06,076 INFO L225 Difference]: With dead ends: 42 [2023-11-26 11:59:06,076 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 11:59:06,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:06,078 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:06,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 11:59:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 11:59:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-26 11:59:06,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2023-11-26 11:59:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:06,087 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-26 11:59:06,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 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 11:59:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-26 11:59:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:59:06,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:06,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:06,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:59:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 11:59:06,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:06,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2022221855, now seen corresponding path program 1 times [2023-11-26 11:59:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17387131] [2023-11-26 11:59:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:06,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:06,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:06,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633896117] [2023-11-26 11:59:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:06,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:06,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:06,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:59:06,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:59:06,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:59:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:06,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17387131] [2023-11-26 11:59:06,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:06,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633896117] [2023-11-26 11:59:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633896117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:06,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-11-26 11:59:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474929035] [2023-11-26 11:59:06,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:06,556 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:06,734 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-11-26 11:59:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-26 11:59:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:06,736 INFO L225 Difference]: With dead ends: 30 [2023-11-26 11:59:06,736 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 11:59:06,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:06,737 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:06,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 11:59:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-26 11:59:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-26 11:59:06,747 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-11-26 11:59:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:06,748 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-26 11:59:06,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:59:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-26 11:59:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:59:06,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:06,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:06,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:06,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:06,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -989864836, now seen corresponding path program 1 times [2023-11-26 11:59:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:06,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734589921] [2023-11-26 11:59:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:06,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18164021] [2023-11-26 11:59:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:06,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:06,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:06,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:59:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:07,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:59:07,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:07,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734589921] [2023-11-26 11:59:10,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18164021] [2023-11-26 11:59:10,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18164021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:10,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:10,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-11-26 11:59:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080166064] [2023-11-26 11:59:10,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:59:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:59:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:59:10,290 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:17,334 WARN L293 SmtUtils]: Spent 6.75s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-26 11:59:19,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:20,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:28,425 WARN L293 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-26 11:59:31,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:32,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:39,994 WARN L293 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-26 11:59:47,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:51,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:56,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 11:59:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:57,378 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2023-11-26 11:59:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:59:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-26 11:59:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:57,382 INFO L225 Difference]: With dead ends: 73 [2023-11-26 11:59:57,382 INFO L226 Difference]: Without dead ends: 63 [2023-11-26 11:59:57,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:59:57,384 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:57,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 84 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 2 Unknown, 0 Unchecked, 21.9s Time] [2023-11-26 11:59:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-26 11:59:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-11-26 11:59:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 11:59:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-11-26 11:59:57,418 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 20 [2023-11-26 11:59:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:57,418 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-11-26 11:59:57,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-11-26 11:59:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:59:57,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:57,421 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:57,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:57,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:59:57,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:59:57,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1184125773, now seen corresponding path program 2 times [2023-11-26 11:59:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873313642] [2023-11-26 11:59:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:57,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:57,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085836910] [2023-11-26 11:59:57,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:57,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:57,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:57,654 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:57,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f56daaa-925d-42ba-a584-06e123fa176b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:59:57,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:57,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 11:59:57,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:58,235 INFO L327 TraceCheckSpWp]: Computing backward predicates...