./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/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_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/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_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:17,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:17,523 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:57:17,528 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:17,529 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:17,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:17,557 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:17,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:17,559 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:17,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:17,561 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:17,561 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:17,562 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:17,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:17,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:17,564 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:17,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:17,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:17,566 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:17,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:17,567 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:17,568 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:17,568 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:17,569 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:17,569 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:17,570 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:17,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:17,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:17,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:17,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:17,573 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:17,573 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:17,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:17,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:17,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:17,575 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:17,576 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:17,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:17,576 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:17,577 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_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2023-11-06 21:57:17,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:17,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:17,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:17,871 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:17,873 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:17,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-11-06 21:57:21,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:21,420 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:21,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-11-06 21:57:21,433 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/data/282713d80/8275dd334aee422299de19ea5f5c290a/FLAG6cedbef3c [2023-11-06 21:57:21,455 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/data/282713d80/8275dd334aee422299de19ea5f5c290a [2023-11-06 21:57:21,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:21,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:21,468 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:21,468 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:21,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:21,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b4a560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21, skipping insertion in model container [2023-11-06 21:57:21,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,509 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:21,653 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_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-11-06 21:57:21,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:21,690 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:21,702 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_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-11-06 21:57:21,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:21,732 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:21,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21 WrapperNode [2023-11-06 21:57:21,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:21,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:21,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:21,734 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:21,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,751 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,778 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2023-11-06 21:57:21,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:21,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:21,779 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:21,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:21,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,804 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,808 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:21,812 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:21,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:21,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:21,813 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (1/1) ... [2023-11-06 21:57:21,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:21,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:21,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:57:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:57:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:21,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:57:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:57:21,974 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:21,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:22,225 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:22,232 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:22,233 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 21:57:22,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:22 BoogieIcfgContainer [2023-11-06 21:57:22,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:22,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:22,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:22,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:22,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:21" (1/3) ... [2023-11-06 21:57:22,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48202c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:22, skipping insertion in model container [2023-11-06 21:57:22,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:21" (2/3) ... [2023-11-06 21:57:22,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48202c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:22, skipping insertion in model container [2023-11-06 21:57:22,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:22" (3/3) ... [2023-11-06 21:57:22,246 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2023-11-06 21:57:22,268 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:22,268 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:57:22,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:57:22,334 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;@db6df21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:57:22,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:57:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:57:22,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:22,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:22,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:22,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2023-11-06 21:57:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397106361] [2023-11-06 21:57:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:22,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:22,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397106361] [2023-11-06 21:57:22,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397106361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:22,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:22,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042060509] [2023-11-06 21:57:22,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:22,861 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:23,016 INFO L93 Difference]: Finished difference Result 75 states and 117 transitions. [2023-11-06 21:57:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 21:57:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:23,029 INFO L225 Difference]: With dead ends: 75 [2023-11-06 21:57:23,030 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 21:57:23,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:23,042 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:23,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:57:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 21:57:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2023-11-06 21:57:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-11-06 21:57:23,078 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2023-11-06 21:57:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:23,079 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-11-06 21:57:23,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-11-06 21:57:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:57:23,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:23,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:23,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:57:23,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:23,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2023-11-06 21:57:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:23,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653626886] [2023-11-06 21:57:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:23,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:23,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653626886] [2023-11-06 21:57:23,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653626886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:23,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:23,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:23,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800891370] [2023-11-06 21:57:23,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:23,209 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:23,260 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-11-06 21:57:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 21:57:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:23,262 INFO L225 Difference]: With dead ends: 52 [2023-11-06 21:57:23,263 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 21:57:23,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:23,265 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:23,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 21:57:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2023-11-06 21:57:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-06 21:57:23,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2023-11-06 21:57:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:23,275 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-06 21:57:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-06 21:57:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 21:57:23,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:23,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:23,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:57:23,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:23,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2023-11-06 21:57:23,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:23,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182277155] [2023-11-06 21:57:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:23,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182277155] [2023-11-06 21:57:23,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182277155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:23,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:23,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91556430] [2023-11-06 21:57:23,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:23,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:23,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:23,487 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:23,530 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-11-06 21:57:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 21:57:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:23,536 INFO L225 Difference]: With dead ends: 74 [2023-11-06 21:57:23,536 INFO L226 Difference]: Without dead ends: 51 [2023-11-06 21:57:23,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:23,540 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:23,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 94 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-06 21:57:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2023-11-06 21:57:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-11-06 21:57:23,559 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2023-11-06 21:57:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:23,560 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-11-06 21:57:23,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-11-06 21:57:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 21:57:23,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:23,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:57:23,569 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:23,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2023-11-06 21:57:23,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:23,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68212280] [2023-11-06 21:57:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:23,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:57:23,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68212280] [2023-11-06 21:57:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68212280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:23,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:23,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225995930] [2023-11-06 21:57:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:23,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:23,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:23,739 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:23,775 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2023-11-06 21:57:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 21:57:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:23,777 INFO L225 Difference]: With dead ends: 82 [2023-11-06 21:57:23,777 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 21:57:23,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:23,779 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:23,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 21:57:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2023-11-06 21:57:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-11-06 21:57:23,791 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2023-11-06 21:57:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:23,792 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-11-06 21:57:23,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-11-06 21:57:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:57:23,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:23,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:23,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:57:23,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:23,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2023-11-06 21:57:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:23,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565451738] [2023-11-06 21:57:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:23,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:23,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565451738] [2023-11-06 21:57:23,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565451738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:23,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:23,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:23,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395976268] [2023-11-06 21:57:23,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:23,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:23,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:23,852 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:23,874 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-11-06 21:57:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-06 21:57:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:23,876 INFO L225 Difference]: With dead ends: 46 [2023-11-06 21:57:23,876 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 21:57:23,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:23,878 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:23,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 21:57:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-06 21:57:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-06 21:57:23,888 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2023-11-06 21:57:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:23,889 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-06 21:57:23,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-06 21:57:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:57:23,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:23,890 INFO L195 NwaCegarLoop]: trace histogram [1, 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 21:57:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:57:23,891 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:23,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2023-11-06 21:57:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:23,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147441499] [2023-11-06 21:57:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147441499] [2023-11-06 21:57:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147441499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771731192] [2023-11-06 21:57:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:24,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:24,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:24,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:24,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:57:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:24,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:57:24,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:24,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:24,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771731192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:24,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:24,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 21:57:24,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743174616] [2023-11-06 21:57:24,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:24,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:57:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:57:24,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:57:24,336 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:24,602 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2023-11-06 21:57:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:57:24,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 21:57:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:24,609 INFO L225 Difference]: With dead ends: 141 [2023-11-06 21:57:24,609 INFO L226 Difference]: Without dead ends: 111 [2023-11-06 21:57:24,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:57:24,616 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 169 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:24,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 92 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:57:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-06 21:57:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2023-11-06 21:57:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-11-06 21:57:24,633 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2023-11-06 21:57:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:24,634 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-11-06 21:57:24,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-11-06 21:57:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 21:57:24,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:24,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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 21:57:24,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:24,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:24,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash 492833075, now seen corresponding path program 2 times [2023-11-06 21:57:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:24,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074378003] [2023-11-06 21:57:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-06 21:57:24,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:24,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074378003] [2023-11-06 21:57:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074378003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:24,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031100167] [2023-11-06 21:57:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:24,911 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:24,937 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-11-06 21:57:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-06 21:57:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:24,939 INFO L225 Difference]: With dead ends: 66 [2023-11-06 21:57:24,939 INFO L226 Difference]: Without dead ends: 51 [2023-11-06 21:57:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:24,940 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:24,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-06 21:57:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-06 21:57:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-11-06 21:57:24,954 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 34 [2023-11-06 21:57:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:24,954 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-11-06 21:57:24,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-11-06 21:57:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 21:57:24,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:24,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 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 21:57:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:57:24,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:24,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 1 times [2023-11-06 21:57:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:24,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858450574] [2023-11-06 21:57:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:25,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858450574] [2023-11-06 21:57:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858450574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:25,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320748376] [2023-11-06 21:57:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:25,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:25,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:25,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:25,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:57:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:25,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:57:25,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:25,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320748376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:25,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:25,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 21:57:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319252992] [2023-11-06 21:57:25,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:25,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:57:25,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:57:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:57:25,445 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:25,824 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2023-11-06 21:57:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:57:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-06 21:57:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:25,826 INFO L225 Difference]: With dead ends: 204 [2023-11-06 21:57:25,826 INFO L226 Difference]: Without dead ends: 164 [2023-11-06 21:57:25,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:57:25,827 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 381 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:25,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 131 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-06 21:57:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 63. [2023-11-06 21:57:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-11-06 21:57:25,844 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 34 [2023-11-06 21:57:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:25,845 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-11-06 21:57:25,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-11-06 21:57:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 21:57:25,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:25,847 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 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 21:57:25,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:26,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:26,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:26,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash -452665475, now seen corresponding path program 2 times [2023-11-06 21:57:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:26,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676776468] [2023-11-06 21:57:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:26,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676776468] [2023-11-06 21:57:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676776468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272976172] [2023-11-06 21:57:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:57:26,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:26,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:26,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:57:26,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:26,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:26,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:57:26,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:26,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272976172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:27,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:27,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-06 21:57:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734604406] [2023-11-06 21:57:27,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 21:57:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 21:57:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 21:57:27,325 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:28,202 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2023-11-06 21:57:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:57:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-06 21:57:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:28,205 INFO L225 Difference]: With dead ends: 372 [2023-11-06 21:57:28,206 INFO L226 Difference]: Without dead ends: 332 [2023-11-06 21:57:28,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 21:57:28,211 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 931 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:28,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 196 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:57:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-06 21:57:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 87. [2023-11-06 21:57:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2023-11-06 21:57:28,249 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 46 [2023-11-06 21:57:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:28,250 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2023-11-06 21:57:28,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2023-11-06 21:57:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-06 21:57:28,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:28,260 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 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 21:57:28,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:28,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:57:28,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:28,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1586487147, now seen corresponding path program 3 times [2023-11-06 21:57:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:28,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855268961] [2023-11-06 21:57:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:57:29,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855268961] [2023-11-06 21:57:29,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855268961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868971078] [2023-11-06 21:57:29,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:57:29,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:29,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:57:29,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:57:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:29,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:57:29,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2023-11-06 21:57:29,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2023-11-06 21:57:30,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868971078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:30,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 30 [2023-11-06 21:57:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189760619] [2023-11-06 21:57:30,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:30,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 21:57:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 21:57:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2023-11-06 21:57:30,050 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:31,156 INFO L93 Difference]: Finished difference Result 427 states and 474 transitions. [2023-11-06 21:57:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:57:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-06 21:57:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:31,160 INFO L225 Difference]: With dead ends: 427 [2023-11-06 21:57:31,160 INFO L226 Difference]: Without dead ends: 387 [2023-11-06 21:57:31,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 21:57:31,163 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1061 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:31,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 209 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:57:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-06 21:57:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 117. [2023-11-06 21:57:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2023-11-06 21:57:31,217 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 70 [2023-11-06 21:57:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:31,219 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2023-11-06 21:57:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2023-11-06 21:57:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-06 21:57:31,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:31,223 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:31,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:31,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:31,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:31,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1867228667, now seen corresponding path program 1 times [2023-11-06 21:57:31,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:31,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140239471] [2023-11-06 21:57:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:31,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:57:32,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:32,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140239471] [2023-11-06 21:57:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140239471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:32,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589928926] [2023-11-06 21:57:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:32,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:32,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:32,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:32,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:57:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:32,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:57:32,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:57:33,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:57:34,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589928926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:34,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:34,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2023-11-06 21:57:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974951564] [2023-11-06 21:57:34,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:34,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-06 21:57:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-06 21:57:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=3197, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 21:57:34,590 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:37,543 INFO L93 Difference]: Finished difference Result 792 states and 891 transitions. [2023-11-06 21:57:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 21:57:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-06 21:57:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:37,548 INFO L225 Difference]: With dead ends: 792 [2023-11-06 21:57:37,548 INFO L226 Difference]: Without dead ends: 724 [2023-11-06 21:57:37,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3775, Invalid=6125, Unknown=0, NotChecked=0, Total=9900 [2023-11-06 21:57:37,557 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2065 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2065 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:37,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2065 Valid, 414 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:57:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-11-06 21:57:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 167. [2023-11-06 21:57:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 181 transitions. [2023-11-06 21:57:37,584 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 181 transitions. Word has length 90 [2023-11-06 21:57:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:37,584 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 181 transitions. [2023-11-06 21:57:37,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 181 transitions. [2023-11-06 21:57:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-06 21:57:37,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:37,586 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:37,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:37,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:37,792 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:37,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash 838087341, now seen corresponding path program 2 times [2023-11-06 21:57:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:37,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608904694] [2023-11-06 21:57:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:57:41,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:41,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608904694] [2023-11-06 21:57:41,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608904694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:41,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302635956] [2023-11-06 21:57:41,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:57:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:41,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:41,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:57:41,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:41,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:41,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-06 21:57:41,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:57:43,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:57:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302635956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:47,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:47,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 150 [2023-11-06 21:57:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884879971] [2023-11-06 21:57:47,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:47,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-11-06 21:57:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-11-06 21:57:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10003, Invalid=12647, Unknown=0, NotChecked=0, Total=22650 [2023-11-06 21:57:47,578 INFO L87 Difference]: Start difference. First operand 167 states and 181 transitions. Second operand has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:00,308 INFO L93 Difference]: Finished difference Result 1492 states and 1666 transitions. [2023-11-06 21:58:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-06 21:58:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2023-11-06 21:58:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:00,318 INFO L225 Difference]: With dead ends: 1492 [2023-11-06 21:58:00,318 INFO L226 Difference]: Without dead ends: 1424 [2023-11-06 21:58:00,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14501 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=15050, Invalid=24750, Unknown=0, NotChecked=0, Total=39800 [2023-11-06 21:58:00,332 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4453 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:00,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4453 Valid, 717 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 21:58:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2023-11-06 21:58:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 267. [2023-11-06 21:58:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.056390977443609) internal successors, (281), 266 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2023-11-06 21:58:00,394 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 140 [2023-11-06 21:58:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:00,396 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2023-11-06 21:58:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2023-11-06 21:58:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-11-06 21:58:00,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:00,402 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:00,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:00,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:00,610 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:00,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1802074769, now seen corresponding path program 3 times [2023-11-06 21:58:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910340254] [2023-11-06 21:58:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:58:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910340254] [2023-11-06 21:58:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910340254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:11,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811298321] [2023-11-06 21:58:11,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:58:11,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:11,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:11,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:58:11,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:58:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:11,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:58:11,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2023-11-06 21:58:12,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2023-11-06 21:58:12,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811298321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:12,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:12,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 108 [2023-11-06 21:58:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473483166] [2023-11-06 21:58:12,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:12,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-11-06 21:58:12,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-11-06 21:58:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5478, Invalid=6294, Unknown=0, NotChecked=0, Total=11772 [2023-11-06 21:58:12,688 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:57,465 INFO L93 Difference]: Finished difference Result 2964 states and 3197 transitions. [2023-11-06 21:58:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2023-11-06 21:58:57,466 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2023-11-06 21:58:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:57,483 INFO L225 Difference]: With dead ends: 2964 [2023-11-06 21:58:57,484 INFO L226 Difference]: Without dead ends: 2896 [2023-11-06 21:58:57,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46174 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=53146, Invalid=115364, Unknown=0, NotChecked=0, Total=168510 [2023-11-06 21:58:57,504 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9568 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 2022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9568 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2022 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:57,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9568 Valid, 1069 Invalid, 3369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2022 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-06 21:58:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2023-11-06 21:58:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 770. [2023-11-06 21:58:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1495448634590377) internal successors, (884), 769 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 884 transitions. [2023-11-06 21:58:57,936 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 884 transitions. Word has length 240 [2023-11-06 21:58:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:57,936 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 884 transitions. [2023-11-06 21:58:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 884 transitions. [2023-11-06 21:58:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-06 21:58:57,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:57,941 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:57,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:58,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:58,147 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:58,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1263380961, now seen corresponding path program 1 times [2023-11-06 21:58:58,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:58,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529782170] [2023-11-06 21:58:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 21:59:08,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529782170] [2023-11-06 21:59:08,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529782170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815826583] [2023-11-06 21:59:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:08,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:08,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:08,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594e0e5-9f9a-4150-90aa-ebfc451dac5a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:59:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:09,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-06 21:59:09,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 21:59:15,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 21:59:30,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815826583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:30,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:30,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 309 [2023-11-06 21:59:30,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108189708] [2023-11-06 21:59:30,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:30,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 310 states [2023-11-06 21:59:30,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 310 interpolants. [2023-11-06 21:59:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42439, Invalid=53351, Unknown=0, NotChecked=0, Total=95790 [2023-11-06 21:59:30,575 INFO L87 Difference]: Start difference. First operand 770 states and 884 transitions. Second operand has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)