./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:50:36,324 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:50:36,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:50:36,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:50:36,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:50:36,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:50:36,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:50:36,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:50:36,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:50:36,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:50:36,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:50:36,446 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:50:36,447 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:50:36,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:50:36,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:50:36,449 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:50:36,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:50:36,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:50:36,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:50:36,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:50:36,452 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:50:36,453 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:50:36,453 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:50:36,454 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:50:36,455 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:50:36,455 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:50:36,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:50:36,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:50:36,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:50:36,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:50:36,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:50:36,459 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:50:36,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:50:36,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:50:36,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:50:36,462 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:50:36,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:50:36,463 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:50:36,463 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:50:36,464 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2023-11-06 22:50:36,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:50:36,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:50:36,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:50:36,824 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:50:36,825 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:50:36,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-11-06 22:50:39,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:50:40,230 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:50:40,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-11-06 22:50:40,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data/d6c7ac67e/c4890e92bc0149409980a53f1fe4f408/FLAG179f83878 [2023-11-06 22:50:40,277 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data/d6c7ac67e/c4890e92bc0149409980a53f1fe4f408 [2023-11-06 22:50:40,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:50:40,287 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:50:40,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:50:40,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:50:40,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:50:40,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfb964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40, skipping insertion in model container [2023-11-06 22:50:40,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,331 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:50:40,516 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2023-11-06 22:50:40,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:50:40,570 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:50:40,586 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2023-11-06 22:50:40,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:50:40,625 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:50:40,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40 WrapperNode [2023-11-06 22:50:40,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:50:40,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:50:40,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:50:40,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:50:40,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,663 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-11-06 22:50:40,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:50:40,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:50:40,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:50:40,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:50:40,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,680 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:50:40,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:50:40,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:50:40,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:50:40,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (1/1) ... [2023-11-06 22:50:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:50:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:40,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:50:40,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:50:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:50:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:50:40,772 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:50:40,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:50:40,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:50:40,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:50:40,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:50:40,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:50:40,855 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:50:40,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:50:41,090 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:50:41,096 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:50:41,097 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:50:41,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:41 BoogieIcfgContainer [2023-11-06 22:50:41,099 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:50:41,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:50:41,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:50:41,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:50:41,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:50:40" (1/3) ... [2023-11-06 22:50:41,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5466b703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:41, skipping insertion in model container [2023-11-06 22:50:41,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:40" (2/3) ... [2023-11-06 22:50:41,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5466b703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:41, skipping insertion in model container [2023-11-06 22:50:41,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:41" (3/3) ... [2023-11-06 22:50:41,111 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2023-11-06 22:50:41,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:50:41,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:50:41,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:50:41,201 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=LoopsAndPotentialCycles, 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;@697697d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:50:41,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:50:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 22:50:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:50:41,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:41,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:41,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:41,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2023-11-06 22:50:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:41,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188129523] [2023-11-06 22:50:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:41,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:41,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:41,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188129523] [2023-11-06 22:50:41,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:50:41,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262644530] [2023-11-06 22:50:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:41,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:41,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:41,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:50:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:41,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:50:41,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:50:41,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:50:41,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262644530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:41,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:50:41,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:50:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450467917] [2023-11-06 22:50:41,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:41,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:50:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:50:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:50:41,613 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:50:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:41,649 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2023-11-06 22:50:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:50:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-06 22:50:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:41,663 INFO L225 Difference]: With dead ends: 61 [2023-11-06 22:50:41,663 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 22:50:41,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:50:41,675 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:41,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:50:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 22:50:41,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 22:50:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:50:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-11-06 22:50:41,731 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2023-11-06 22:50:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:41,731 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-11-06 22:50:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:50:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-11-06 22:50:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:50:41,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:41,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:41,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:41,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:50:41,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:41,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2023-11-06 22:50:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:41,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60839491] [2023-11-06 22:50:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:41,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:41,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668345837] [2023-11-06 22:50:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:41,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:41,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:50:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:42,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:50:42,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:50:42,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:50:42,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:42,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60839491] [2023-11-06 22:50:42,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668345837] [2023-11-06 22:50:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668345837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:42,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:42,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-11-06 22:50:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510287887] [2023-11-06 22:50:42,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:42,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:50:42,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:50:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:50:42,243 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:50:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:42,420 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-11-06 22:50:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:50:42,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-11-06 22:50:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:42,425 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:50:42,425 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 22:50:42,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:50:42,429 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:42,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:50:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 22:50:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-06 22:50:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:50:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-06 22:50:42,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2023-11-06 22:50:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:42,456 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-06 22:50:42,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:50:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-06 22:50:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:50:42,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:42,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:42,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:50:42,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:42,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:42,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2023-11-06 22:50:42,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:42,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164198575] [2023-11-06 22:50:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:42,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:42,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681499289] [2023-11-06 22:50:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:42,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:42,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:42,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:42,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:50:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:42,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:50:42,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:50:42,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:50:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164198575] [2023-11-06 22:50:42,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:42,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681499289] [2023-11-06 22:50:42,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681499289] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:42,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:42,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-06 22:50:42,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411623757] [2023-11-06 22:50:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:42,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:50:42,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:50:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:50:42,951 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:50:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:43,009 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-11-06 22:50:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:50:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-11-06 22:50:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:43,011 INFO L225 Difference]: With dead ends: 36 [2023-11-06 22:50:43,012 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 22:50:43,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:50:43,013 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:43,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 109 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:50:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 22:50:43,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-06 22:50:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:50:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-11-06 22:50:43,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2023-11-06 22:50:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:43,026 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-11-06 22:50:43,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:50:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-11-06 22:50:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:50:43,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:43,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:43,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:43,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:43,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2023-11-06 22:50:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:43,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112487172] [2023-11-06 22:50:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:43,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:43,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:43,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922184611] [2023-11-06 22:50:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:43,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:43,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:43,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:43,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:50:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:43,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:50:43,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:50:43,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:50:43,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:43,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112487172] [2023-11-06 22:50:43,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:43,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922184611] [2023-11-06 22:50:43,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922184611] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:43,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:43,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-06 22:50:43,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546544629] [2023-11-06 22:50:43,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:50:43,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:50:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:50:43,751 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:50:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:43,811 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-11-06 22:50:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:50:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-11-06 22:50:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:43,816 INFO L225 Difference]: With dead ends: 47 [2023-11-06 22:50:43,817 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 22:50:43,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:50:43,821 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:43,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:50:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 22:50:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-11-06 22:50:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:50:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-11-06 22:50:43,854 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2023-11-06 22:50:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:43,854 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-11-06 22:50:43,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:50:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-11-06 22:50:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:50:43,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:43,859 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:43,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:44,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:44,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2023-11-06 22:50:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:44,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978654810] [2023-11-06 22:50:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:44,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:44,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:44,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667928606] [2023-11-06 22:50:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:44,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:44,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:44,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:44,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:50:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:44,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:50:44,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:50:44,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:50:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978654810] [2023-11-06 22:50:44,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:44,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667928606] [2023-11-06 22:50:44,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667928606] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:44,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:44,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-06 22:50:44,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452168772] [2023-11-06 22:50:44,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:44,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:50:44,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:50:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:50:44,506 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:50:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:44,567 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-11-06 22:50:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:50:44,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-11-06 22:50:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:44,569 INFO L225 Difference]: With dead ends: 51 [2023-11-06 22:50:44,569 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:50:44,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:50:44,571 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 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 [2023-11-06 22:50:44,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:50:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:50:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-06 22:50:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:50:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2023-11-06 22:50:44,596 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2023-11-06 22:50:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:44,596 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2023-11-06 22:50:44,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:50:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2023-11-06 22:50:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 22:50:44,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:44,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:44,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:44,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:44,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:44,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2023-11-06 22:50:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299370724] [2023-11-06 22:50:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:44,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:44,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67700739] [2023-11-06 22:50:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:44,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:44,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:44,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:50:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:44,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:50:44,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 22:50:45,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:45,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299370724] [2023-11-06 22:50:45,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67700739] [2023-11-06 22:50:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67700739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:45,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:45,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-06 22:50:45,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020344839] [2023-11-06 22:50:45,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:45,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:50:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:50:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:50:45,227 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 22:50:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:45,345 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-11-06 22:50:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:50:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-11-06 22:50:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:45,348 INFO L225 Difference]: With dead ends: 55 [2023-11-06 22:50:45,348 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:50:45,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:50:45,349 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:45,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:50:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:50:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-06 22:50:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:50:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-11-06 22:50:45,367 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2023-11-06 22:50:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:45,367 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-11-06 22:50:45,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 22:50:45,368 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-11-06 22:50:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:50:45,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:45,370 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:45,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:45,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:50:45,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:45,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2023-11-06 22:50:45,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:45,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583142115] [2023-11-06 22:50:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:45,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:45,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:45,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154753594] [2023-11-06 22:50:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:45,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:45,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:50:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:45,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:50:45,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-06 22:50:45,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-06 22:50:45,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583142115] [2023-11-06 22:50:45,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154753594] [2023-11-06 22:50:45,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154753594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:45,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:45,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-06 22:50:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599212438] [2023-11-06 22:50:45,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:45,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:50:45,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:50:45,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:50:45,842 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:50:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:46,050 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2023-11-06 22:50:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:50:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-11-06 22:50:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:46,053 INFO L225 Difference]: With dead ends: 99 [2023-11-06 22:50:46,053 INFO L226 Difference]: Without dead ends: 91 [2023-11-06 22:50:46,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:50:46,055 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:46,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 205 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:50:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-06 22:50:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-11-06 22:50:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-06 22:50:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2023-11-06 22:50:46,088 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2023-11-06 22:50:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:46,089 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2023-11-06 22:50:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 22:50:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2023-11-06 22:50:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:50:46,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:46,091 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:46,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:46,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:46,301 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:46,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2023-11-06 22:50:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:46,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366030425] [2023-11-06 22:50:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:46,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:46,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948239793] [2023-11-06 22:50:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:46,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:46,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:46,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:50:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:46,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:50:46,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 22:50:46,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:50:46,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:46,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366030425] [2023-11-06 22:50:46,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:46,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948239793] [2023-11-06 22:50:46,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948239793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:46,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:46,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-11-06 22:50:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884052645] [2023-11-06 22:50:46,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:50:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:50:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:50:46,894 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-06 22:50:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:47,471 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2023-11-06 22:50:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:50:47,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 60 [2023-11-06 22:50:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:47,476 INFO L225 Difference]: With dead ends: 125 [2023-11-06 22:50:47,476 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:50:47,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:50:47,477 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:47,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:50:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:50:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2023-11-06 22:50:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-06 22:50:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2023-11-06 22:50:47,525 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2023-11-06 22:50:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:47,526 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2023-11-06 22:50:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-06 22:50:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2023-11-06 22:50:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 22:50:47,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:47,528 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:47,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:47,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:47,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2023-11-06 22:50:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:47,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169264903] [2023-11-06 22:50:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:47,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:47,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474501533] [2023-11-06 22:50:47,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:50:47,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:47,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:47,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:47,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:50:47,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:50:47,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:47,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:50:47,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-06 22:50:48,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:48,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169264903] [2023-11-06 22:50:48,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474501533] [2023-11-06 22:50:48,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474501533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:48,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:48,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-06 22:50:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356946159] [2023-11-06 22:50:48,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:48,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:50:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:48,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:50:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:50:48,592 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-06 22:50:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:48,978 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2023-11-06 22:50:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:50:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 65 [2023-11-06 22:50:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:48,982 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:50:48,982 INFO L226 Difference]: Without dead ends: 119 [2023-11-06 22:50:48,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:50:48,986 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:48,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 179 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:50:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-06 22:50:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-11-06 22:50:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 40 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-06 22:50:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2023-11-06 22:50:49,048 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 65 [2023-11-06 22:50:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:49,048 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2023-11-06 22:50:49,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-06 22:50:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2023-11-06 22:50:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-06 22:50:49,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:49,054 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:49,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:49,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:49,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:49,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2023-11-06 22:50:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90056135] [2023-11-06 22:50:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:49,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:49,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961379932] [2023-11-06 22:50:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:50:49,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:49,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:49,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:49,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:50:49,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:50:49,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:49,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:50:49,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-06 22:50:49,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:52,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90056135] [2023-11-06 22:50:52,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961379932] [2023-11-06 22:50:52,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961379932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:52,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:50:52,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-06 22:50:52,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497815731] [2023-11-06 22:50:52,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:52,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:50:52,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:50:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:50:52,636 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-06 22:50:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:53,691 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2023-11-06 22:50:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:50:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2023-11-06 22:50:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:53,694 INFO L225 Difference]: With dead ends: 125 [2023-11-06 22:50:53,694 INFO L226 Difference]: Without dead ends: 123 [2023-11-06 22:50:53,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:50:53,696 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:53,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 180 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:50:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-06 22:50:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-11-06 22:50:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-06 22:50:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 158 transitions. [2023-11-06 22:50:53,742 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 158 transitions. Word has length 70 [2023-11-06 22:50:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:53,745 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 158 transitions. [2023-11-06 22:50:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-06 22:50:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 158 transitions. [2023-11-06 22:50:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-06 22:50:53,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:53,748 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:53,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:53,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:53,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2023-11-06 22:50:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:53,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483635544] [2023-11-06 22:50:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:53,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:53,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:50:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157554598] [2023-11-06 22:50:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:53,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:53,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:54,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:50:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:54,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:50:54,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-06 22:50:54,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-06 22:50:56,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:56,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483635544] [2023-11-06 22:50:56,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:50:56,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157554598] [2023-11-06 22:50:56,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157554598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:56,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:50:56,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-06 22:50:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991982909] [2023-11-06 22:50:56,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:50:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:50:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:50:56,023 INFO L87 Difference]: Start difference. First operand 120 states and 158 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-06 22:51:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:06,998 INFO L93 Difference]: Finished difference Result 205 states and 290 transitions. [2023-11-06 22:51:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:51:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 76 [2023-11-06 22:51:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:07,001 INFO L225 Difference]: With dead ends: 205 [2023-11-06 22:51:07,001 INFO L226 Difference]: Without dead ends: 201 [2023-11-06 22:51:07,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:51:07,004 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 91 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:07,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 417 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-06 22:51:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-06 22:51:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2023-11-06 22:51:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 105 states have (on average 1.2) internal successors, (126), 106 states have internal predecessors, (126), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-06 22:51:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 279 transitions. [2023-11-06 22:51:07,112 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 279 transitions. Word has length 76 [2023-11-06 22:51:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:07,112 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 279 transitions. [2023-11-06 22:51:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-11-06 22:51:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 279 transitions. [2023-11-06 22:51:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-06 22:51:07,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:07,115 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:07,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:07,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:07,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1119373286, now seen corresponding path program 4 times [2023-11-06 22:51:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254170121] [2023-11-06 22:51:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:07,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906790734] [2023-11-06 22:51:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:51:07,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:07,342 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:07,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:51:07,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:51:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:07,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:51:07,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-06 22:51:07,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:51:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254170121] [2023-11-06 22:51:07,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:07,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906790734] [2023-11-06 22:51:07,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906790734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:51:07,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:51:07,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:51:07,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187533026] [2023-11-06 22:51:07,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:51:07,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:51:07,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:51:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:51:07,453 INFO L87 Difference]: Start difference. First operand 197 states and 279 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-06 22:51:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:07,608 INFO L93 Difference]: Finished difference Result 250 states and 351 transitions. [2023-11-06 22:51:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:51:07,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 90 [2023-11-06 22:51:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:07,611 INFO L225 Difference]: With dead ends: 250 [2023-11-06 22:51:07,611 INFO L226 Difference]: Without dead ends: 178 [2023-11-06 22:51:07,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:51:07,614 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:07,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 143 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:51:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-06 22:51:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2023-11-06 22:51:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 61 states have call successors, (61), 14 states have call predecessors, (61), 14 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:51:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 222 transitions. [2023-11-06 22:51:07,702 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 222 transitions. Word has length 90 [2023-11-06 22:51:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:07,703 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 222 transitions. [2023-11-06 22:51:07,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-06 22:51:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 222 transitions. [2023-11-06 22:51:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:51:07,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:07,705 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:07,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:07,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:51:07,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:07,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:07,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2023-11-06 22:51:07,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:07,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932783117] [2023-11-06 22:51:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:07,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:07,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526026504] [2023-11-06 22:51:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:07,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:07,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:07,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:07,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:51:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:08,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:51:08,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-06 22:51:09,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-11-06 22:51:13,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:13,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932783117] [2023-11-06 22:51:13,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:13,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526026504] [2023-11-06 22:51:13,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526026504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:13,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:51:13,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-11-06 22:51:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024239777] [2023-11-06 22:51:13,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:13,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:51:13,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:51:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:51:13,447 INFO L87 Difference]: Start difference. First operand 164 states and 222 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-11-06 22:51:24,028 WARN L293 SmtUtils]: Spent 9.25s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:51:33,932 WARN L293 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:51:36,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:51:38,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:51:43,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:51:45,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:51:48,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:51:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:51:55,277 INFO L93 Difference]: Finished difference Result 206 states and 282 transitions. [2023-11-06 22:51:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:51:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 92 [2023-11-06 22:51:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:51:55,280 INFO L225 Difference]: With dead ends: 206 [2023-11-06 22:51:55,280 INFO L226 Difference]: Without dead ends: 204 [2023-11-06 22:51:55,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=334, Invalid=1225, Unknown=1, NotChecked=0, Total=1560 [2023-11-06 22:51:55,282 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 79 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:51:55,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 417 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 550 Invalid, 5 Unknown, 0 Unchecked, 15.2s Time] [2023-11-06 22:51:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-06 22:51:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2023-11-06 22:51:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-06 22:51:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2023-11-06 22:51:55,428 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 92 [2023-11-06 22:51:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:51:55,428 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2023-11-06 22:51:55,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-11-06 22:51:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2023-11-06 22:51:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 22:51:55,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:51:55,431 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:55,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:55,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:55,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:51:55,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1880436805, now seen corresponding path program 2 times [2023-11-06 22:51:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:55,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480742571] [2023-11-06 22:51:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:55,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:51:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188352625] [2023-11-06 22:51:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:51:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:55,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:55,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:51:55,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:51:55,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:55,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:51:55,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-06 22:51:56,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-06 22:51:57,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480742571] [2023-11-06 22:51:57,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:51:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188352625] [2023-11-06 22:51:57,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188352625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:57,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:51:57,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-06 22:51:57,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969268451] [2023-11-06 22:51:57,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:57,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:51:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:57,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:51:57,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:51:57,485 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-11-06 22:52:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:12,486 INFO L93 Difference]: Finished difference Result 300 states and 427 transitions. [2023-11-06 22:52:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:52:12,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 109 [2023-11-06 22:52:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:12,490 INFO L225 Difference]: With dead ends: 300 [2023-11-06 22:52:12,490 INFO L226 Difference]: Without dead ends: 298 [2023-11-06 22:52:12,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:52:12,492 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:12,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 591 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-06 22:52:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-06 22:52:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 263. [2023-11-06 22:52:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 141 states have internal predecessors, (162), 105 states have call successors, (105), 18 states have call predecessors, (105), 18 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-06 22:52:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 371 transitions. [2023-11-06 22:52:12,734 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 371 transitions. Word has length 109 [2023-11-06 22:52:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:12,734 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 371 transitions. [2023-11-06 22:52:12,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-11-06 22:52:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 371 transitions. [2023-11-06 22:52:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 22:52:12,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:12,737 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:12,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:12,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:12,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:12,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash 468383399, now seen corresponding path program 3 times [2023-11-06 22:52:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:12,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7874215] [2023-11-06 22:52:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:12,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:12,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295938425] [2023-11-06 22:52:12,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:12,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:12,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:52:13,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:52:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:13,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 22:52:13,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-11-06 22:52:13,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-11-06 22:52:15,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:15,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7874215] [2023-11-06 22:52:15,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:15,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295938425] [2023-11-06 22:52:15,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295938425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:15,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:52:15,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-11-06 22:52:15,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607129304] [2023-11-06 22:52:15,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:52:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:15,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:52:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:52:15,478 INFO L87 Difference]: Start difference. First operand 263 states and 371 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-06 22:52:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:24,295 INFO L93 Difference]: Finished difference Result 397 states and 572 transitions. [2023-11-06 22:52:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:52:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 112 [2023-11-06 22:52:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:24,299 INFO L225 Difference]: With dead ends: 397 [2023-11-06 22:52:24,300 INFO L226 Difference]: Without dead ends: 395 [2023-11-06 22:52:24,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:52:24,302 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:24,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 423 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-06 22:52:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-06 22:52:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 369. [2023-11-06 22:52:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 192 states have (on average 1.171875) internal successors, (225), 195 states have internal predecessors, (225), 153 states have call successors, (153), 23 states have call predecessors, (153), 23 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-06 22:52:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 530 transitions. [2023-11-06 22:52:24,692 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 530 transitions. Word has length 112 [2023-11-06 22:52:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:24,693 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 530 transitions. [2023-11-06 22:52:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-06 22:52:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 530 transitions. [2023-11-06 22:52:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 22:52:24,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:24,696 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:24,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:24,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:24,902 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:24,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 2 times [2023-11-06 22:52:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:24,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124390985] [2023-11-06 22:52:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:24,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:24,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088091467] [2023-11-06 22:52:24,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:24,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:24,921 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:24,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:52:25,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:25,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unknown [2023-11-06 22:52:25,012 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-11-06 22:52:25,013 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-11-06 22:52:25,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 22:52:25,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:25,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,228 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:25,232 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:52:25,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:52:25 BoogieIcfgContainer [2023-11-06 22:52:25,267 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:52:25,268 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:52:25,268 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:52:25,268 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:52:25,269 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:41" (3/4) ... [2023-11-06 22:52:25,272 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-06 22:52:25,273 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:52:25,274 INFO L158 Benchmark]: Toolchain (without parser) took 104986.99ms. Allocated memory was 132.1MB in the beginning and 199.2MB in the end (delta: 67.1MB). Free memory was 97.6MB in the beginning and 108.6MB in the end (delta: -11.0MB). Peak memory consumption was 57.7MB. Max. memory is 16.1GB. [2023-11-06 22:52:25,275 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 132.1MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:52:25,276 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.59ms. Allocated memory is still 132.1MB. Free memory was 97.1MB in the beginning and 86.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:52:25,277 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.64ms. Allocated memory is still 132.1MB. Free memory was 86.1MB in the beginning and 84.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:52:25,277 INFO L158 Benchmark]: Boogie Preprocessor took 24.30ms. Allocated memory is still 132.1MB. Free memory was 84.5MB in the beginning and 83.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:52:25,278 INFO L158 Benchmark]: RCFGBuilder took 410.59ms. Allocated memory is still 132.1MB. Free memory was 83.4MB in the beginning and 71.9MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 22:52:25,278 INFO L158 Benchmark]: TraceAbstraction took 104164.55ms. Allocated memory was 132.1MB in the beginning and 199.2MB in the end (delta: 67.1MB). Free memory was 70.9MB in the beginning and 109.6MB in the end (delta: -38.8MB). Peak memory consumption was 30.4MB. Max. memory is 16.1GB. [2023-11-06 22:52:25,278 INFO L158 Benchmark]: Witness Printer took 5.55ms. Allocated memory is still 199.2MB. Free memory was 109.6MB in the beginning and 108.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:52:25,285 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 132.1MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.59ms. Allocated memory is still 132.1MB. Free memory was 97.1MB in the beginning and 86.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.64ms. Allocated memory is still 132.1MB. Free memory was 86.1MB in the beginning and 84.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.30ms. Allocated memory is still 132.1MB. Free memory was 84.5MB in the beginning and 83.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 410.59ms. Allocated memory is still 132.1MB. Free memory was 83.4MB in the beginning and 71.9MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 104164.55ms. Allocated memory was 132.1MB in the beginning and 199.2MB in the end (delta: 67.1MB). Free memory was 70.9MB in the beginning and 109.6MB in the end (delta: -38.8MB). Peak memory consumption was 30.4MB. Max. memory is 16.1GB. * Witness Printer took 5.55ms. Allocated memory is still 199.2MB. Free memory was 109.6MB in the beginning and 108.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s, c, k, xy, yy; [L21] x = __VERIFIER_nondet_int() [L22] y = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L23] RET assume_abort_if_not(x >= 1) [L24] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y >= 1) [L26] a = x [L27] b = y [L28] p = 1 [L29] q = 0 [L30] r = 0 [L31] s = 1 [L32] c = 0 [L33] k = 0 [L34] xy = (long long) x * y [L35] yy = (long long) y * y [L36] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L36] RET assume_abort_if_not(xy < 2147483647) [L37] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(yy < 2147483647) [L39] COND TRUE 1 [L40] COND FALSE, EXPR !(!(b != 0)) [L42] EXPR c = a [L43] EXPR k = 0 [L45] COND TRUE, EXPR 1 [L46] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET, EXPR __VERIFIER_assert(a == k * b + c) [L47] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L48] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L49] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND TRUE, EXPR !(c >= b) [L56] EXPR a = b [L57] EXPR b = c [L59] long long temp; [L60] EXPR temp = p [L61] EXPR p = q [L62] EXPR q = temp - q * k [L63] EXPR temp = r [L64] EXPR r = s [L65] EXPR s = temp - s * k [L39-L66] { if (!(b != 0)) break; c = a; k = 0; while (1) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L39] COND TRUE 1 [L40] COND FALSE, EXPR !(!(b != 0)) [L42] EXPR c = a [L43] EXPR k = 0 [L45] COND TRUE, EXPR 1 [L46] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET, EXPR __VERIFIER_assert(a == k * b + c) [L47] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L48] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L49] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND FALSE, EXPR !(!(c >= b)) [L52] EXPR c = c - b [L53] EXPR k = k + 1 [L45] COND TRUE, EXPR 1 [L46] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET, EXPR __VERIFIER_assert(a == k * b + c) [L47] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L48] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L49] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND FALSE, EXPR !(!(c >= b)) [L52] EXPR c = c - b [L53] EXPR k = k + 1 [L45] COND TRUE, EXPR 1 [L46] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET, EXPR __VERIFIER_assert(a == k * b + c) [L47] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L48] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L49] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND TRUE, EXPR !(c >= b) [L56] EXPR a = b [L57] EXPR b = c [L59] long long temp; [L60] EXPR temp = p [L61] EXPR p = q [L62] EXPR q = temp - q * k [L63] EXPR temp = r [L64] EXPR r = s [L65] EXPR s = temp - s * k [L39-L66] { if (!(b != 0)) break; c = a; k = 0; while (1) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L39] COND TRUE 1 [L40] COND TRUE !(b != 0) [L69] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 104.1s, OverallIterations: 16, TraceHistogramMax: 17, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 79.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 641 SdHoareTripleChecker+Valid, 31.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 572 mSDsluCounter, 3433 SdHoareTripleChecker+Invalid, 31.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2898 mSDsCounter, 607 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3084 IncrementalHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 607 mSolverCounterUnsat, 535 mSDtfsCounter, 3084 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1719 GetRequests, 1416 SyntacticMatches, 6 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 51.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=369occurred in iteration=15, InterpolantAutomatonStates: 201, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 146 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 17.7s InterpolantComputationTime, 1086 NumberOfCodeBlocks, 1017 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1547 ConstructedInterpolants, 0 QuantifiedInterpolants, 9988 SizeOfPredicates, 90 NumberOfNonLiveVariables, 2304 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 25 InterpolantComputations, 5 PerfectInterpolantSequences, 3411/3718 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-06 22:52:25,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:52:27,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:52:28,060 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-06 22:52:28,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:52:28,071 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:52:28,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:52:28,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:52:28,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:52:28,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:52:28,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:52:28,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:52:28,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:52:28,126 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:52:28,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:52:28,129 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:52:28,129 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:52:28,130 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:52:28,130 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:52:28,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:52:28,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:52:28,132 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:52:28,133 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:52:28,133 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:52:28,133 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:52:28,134 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:52:28,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:52:28,134 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:52:28,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:52:28,135 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:52:28,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:52:28,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:28,137 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:52:28,138 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:52:28,138 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:52:28,138 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:52:28,139 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:52:28,139 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:52:28,139 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:52:28,139 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:52:28,140 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:52:28,141 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:52:28,141 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:52:28,141 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2023-11-06 22:52:28,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:52:28,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:52:28,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:52:28,577 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:52:28,578 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:52:28,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-11-06 22:52:31,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:52:31,849 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:52:31,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-11-06 22:52:31,864 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data/cc058124b/c901b14c6f924a4895c4cbd3c06b8146/FLAG677343caa [2023-11-06 22:52:31,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/data/cc058124b/c901b14c6f924a4895c4cbd3c06b8146 [2023-11-06 22:52:31,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:52:31,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:52:31,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:31,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:52:31,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:52:31,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:31" (1/1) ... [2023-11-06 22:52:31,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31dbd22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:31, skipping insertion in model container [2023-11-06 22:52:31,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:31" (1/1) ... [2023-11-06 22:52:31,934 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:52:32,136 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2023-11-06 22:52:32,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:32,198 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:52:32,220 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_1c06e9ab-878f-47c4-8220-c0283044fc4b/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2023-11-06 22:52:32,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:32,259 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:52:32,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32 WrapperNode [2023-11-06 22:52:32,260 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:32,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:32,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:52:32,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:52:32,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,323 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2023-11-06 22:52:32,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:32,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:52:32,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:52:32,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:52:32,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:52:32,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:52:32,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:52:32,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:52:32,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (1/1) ... [2023-11-06 22:52:32,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:32,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:52:32,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:52:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:52:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:52:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:52:32,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:52:32,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:52:32,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:52:32,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:52:32,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:52:32,605 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:52:32,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:52:33,509 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:52:33,524 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:52:33,525 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:52:33,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:33 BoogieIcfgContainer [2023-11-06 22:52:33,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:52:33,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:52:33,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:52:33,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:52:33,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:31" (1/3) ... [2023-11-06 22:52:33,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d60923c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:33, skipping insertion in model container [2023-11-06 22:52:33,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:32" (2/3) ... [2023-11-06 22:52:33,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d60923c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:33, skipping insertion in model container [2023-11-06 22:52:33,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:33" (3/3) ... [2023-11-06 22:52:33,537 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2023-11-06 22:52:33,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:52:33,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:52:33,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:52:33,641 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=LoopsAndPotentialCycles, 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;@10bf7423, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:52:33,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:52:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 22:52:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:52:33,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:33,659 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:33,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:33,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2023-11-06 22:52:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:52:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95923657] [2023-11-06 22:52:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:33,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:52:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:52:33,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:52:33,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:52:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:33,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:52:33,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:52:34,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:34,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:52:34,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95923657] [2023-11-06 22:52:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95923657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:34,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:34,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:52:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868809306] [2023-11-06 22:52:34,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:34,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:52:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:52:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:52:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:52:34,044 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:52:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:34,089 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2023-11-06 22:52:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:52:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-11-06 22:52:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:34,098 INFO L225 Difference]: With dead ends: 61 [2023-11-06 22:52:34,099 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 22:52:34,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:52:34,106 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:34,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 22:52:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 22:52:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:52:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-11-06 22:52:34,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2023-11-06 22:52:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:34,148 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-11-06 22:52:34,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:52:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-11-06 22:52:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:52:34,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:34,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:34,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:34,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:52:34,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:34,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2023-11-06 22:52:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:52:34,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208200836] [2023-11-06 22:52:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:52:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:52:34,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:52:34,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:52:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:34,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:34,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:52:37,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:52:38,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:52:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208200836] [2023-11-06 22:52:38,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208200836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:38,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:52:38,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-06 22:52:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815039215] [2023-11-06 22:52:38,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:52:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:52:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:52:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:52:38,650 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-06 22:52:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:49,664 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-11-06 22:52:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:52:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 29 [2023-11-06 22:52:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:49,667 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:52:49,667 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 22:52:49,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:52:49,669 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 169 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-11-06 22:52:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 22:52:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-06 22:52:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:52:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-06 22:52:49,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2023-11-06 22:52:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:49,687 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-06 22:52:49,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-06 22:52:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-06 22:52:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:52:49,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:49,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:49,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:52:49,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:49,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:49,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2023-11-06 22:52:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:52:49,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755850107] [2023-11-06 22:52:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:49,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:52:49,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:52:49,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:52:49,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:52:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:50,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:52:50,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:52:57,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:53:02,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:53:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755850107] [2023-11-06 22:53:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755850107] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:02,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:53:02,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-11-06 22:53:02,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336298947] [2023-11-06 22:53:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:02,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:53:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:53:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:53:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:53:02,651 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:53:07,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:53:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:09,580 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-11-06 22:53:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:53:09,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-11-06 22:53:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:09,592 INFO L225 Difference]: With dead ends: 43 [2023-11-06 22:53:09,593 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 22:53:09,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:53:09,595 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:09,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2023-11-06 22:53:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 22:53:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2023-11-06 22:53:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 22:53:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-11-06 22:53:09,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 30 [2023-11-06 22:53:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:09,611 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-11-06 22:53:09,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 22:53:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-11-06 22:53:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:53:09,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:09,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:09,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:53:09,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:09,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2023-11-06 22:53:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:53:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841327555] [2023-11-06 22:53:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:09,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:53:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:53:09,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:53:09,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:53:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:10,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:53:10,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:53:11,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:53:18,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:53:18,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841327555] [2023-11-06 22:53:18,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841327555] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:18,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:53:18,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-11-06 22:53:18,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038416629] [2023-11-06 22:53:18,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:18,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:53:18,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:53:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:53:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:53:18,827 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:53:22,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:53:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:24,706 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-11-06 22:53:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:53:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-11-06 22:53:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:24,732 INFO L225 Difference]: With dead ends: 51 [2023-11-06 22:53:24,732 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:53:24,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:53:24,734 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:24,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-06 22:53:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:53:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-06 22:53:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-06 22:53:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-11-06 22:53:24,771 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 35 [2023-11-06 22:53:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:24,772 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-11-06 22:53:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:53:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-11-06 22:53:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:53:24,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:24,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:24,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:24,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:53:24,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:24,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2023-11-06 22:53:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:53:24,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547823244] [2023-11-06 22:53:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:24,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:53:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:53:24,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:53:25,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:53:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:25,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:53:25,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 22:53:45,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 22:54:01,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:54:01,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547823244] [2023-11-06 22:54:01,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547823244] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:01,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:54:01,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-06 22:54:01,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770653685] [2023-11-06 22:54:01,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:54:01,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:54:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:54:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:54:01,032 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 22:54:09,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:54:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:12,111 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-11-06 22:54:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:54:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2023-11-06 22:54:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:12,130 INFO L225 Difference]: With dead ends: 55 [2023-11-06 22:54:12,130 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:54:12,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:54:12,132 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:12,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2023-11-06 22:54:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:54:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-06 22:54:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-06 22:54:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-11-06 22:54:12,160 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 40 [2023-11-06 22:54:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:12,161 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-11-06 22:54:12,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 22:54:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-11-06 22:54:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 22:54:12,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:12,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:12,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:12,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:54:12,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:12,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2023-11-06 22:54:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:54:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095282440] [2023-11-06 22:54:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:12,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:54:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:54:12,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:54:12,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:54:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:14,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:54:14,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-06 22:54:33,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:38,197 WARN L861 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~xy~0#1| (_ BitVec 64))) (= (_ bv0 64) (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (bvadd (bvneg (bvmul .cse0 |c_ULTIMATE.start_main_~s~0#1|)) (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~b~0#1| (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|) (bvmul |c_ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~xy~0#1|) (bvneg (bvmul .cse0 |c_ULTIMATE.start_main_~b~0#1|)))))) is different from true [2023-11-06 22:54:40,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:54:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095282440] [2023-11-06 22:54:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095282440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161206503] [2023-11-06 22:54:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:54:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:54:40,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:54:40,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c06e9ab-878f-47c4-8220-c0283044fc4b/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-11-06 22:54:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:41,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:54:41,403 INFO L285 TraceCheckSpWp]: Computing forward predicates...