./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:29,693 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:29,785 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:46:29,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:29,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:29,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:29,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:29,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:29,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:29,825 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:29,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:29,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:29,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:29,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:29,829 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:29,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:29,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:46:29,831 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:29,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:29,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:29,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:29,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:46:29,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:29,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:46:29,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:29,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:46:29,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:29,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:29,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:29,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:29,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:29,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:29,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:29,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:29,842 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:46:29,842 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:29,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:29,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:29,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:29,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:46:29,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:29,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:29,845 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_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2023-11-26 10:46:30,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:30,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:30,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:30,164 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:30,164 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:30,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-11-26 10:46:33,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:33,584 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:33,584 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-11-26 10:46:33,593 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/data/3483fc30c/fc2d4ad538c74e308f694219620bb3f3/FLAG89fd7026f [2023-11-26 10:46:33,611 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/data/3483fc30c/fc2d4ad538c74e308f694219620bb3f3 [2023-11-26 10:46:33,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:33,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:33,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:33,618 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:33,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:33,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df0d4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33, skipping insertion in model container [2023-11-26 10:46:33,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,651 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:33,812 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_2cbf09f5-2845-43c6-b9a0-966243670f64/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2023-11-26 10:46:33,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:33,827 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:33,856 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_2cbf09f5-2845-43c6-b9a0-966243670f64/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2023-11-26 10:46:33,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:33,873 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:33,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33 WrapperNode [2023-11-26 10:46:33,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:33,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:33,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:33,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:33,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,915 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-26 10:46:33,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:33,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:33,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:33,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:33,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,931 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,944 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-11-26 10:46:33,944 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:33,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:33,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:33,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:33,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (1/1) ... [2023-11-26 10:46:33,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:33,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:33,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:46:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:46:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:46:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:46:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:46:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:34,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:46:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:46:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:46:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-11-26 10:46:34,038 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-11-26 10:46:34,188 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:34,191 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:34,503 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:34,566 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:34,573 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:46:34,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:34 BoogieIcfgContainer [2023-11-26 10:46:34,574 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:34,579 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:34,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:34,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:34,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:33" (1/3) ... [2023-11-26 10:46:34,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241e9fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:34, skipping insertion in model container [2023-11-26 10:46:34,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:33" (2/3) ... [2023-11-26 10:46:34,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241e9fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:34, skipping insertion in model container [2023-11-26 10:46:34,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:34" (3/3) ... [2023-11-26 10:46:34,591 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2023-11-26 10:46:34,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:34,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:46:34,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:34,707 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e82122f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:34,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:46:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:46:34,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:34,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:34,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:34,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash -110337137, now seen corresponding path program 1 times [2023-11-26 10:46:34,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:34,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763688618] [2023-11-26 10:46:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:34,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:46:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 10:46:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:46:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:46:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:35,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763688618] [2023-11-26 10:46:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763688618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:35,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:35,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583002546] [2023-11-26 10:46:35,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:35,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:35,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:35,120 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:46:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:35,207 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2023-11-26 10:46:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-26 10:46:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:35,217 INFO L225 Difference]: With dead ends: 43 [2023-11-26 10:46:35,218 INFO L226 Difference]: Without dead ends: 21 [2023-11-26 10:46:35,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:35,225 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:35,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-26 10:46:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-26 10:46:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-26 10:46:35,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2023-11-26 10:46:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:35,271 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-26 10:46:35,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:46:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-26 10:46:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:46:35,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:35,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:46:35,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:35,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1417820460, now seen corresponding path program 1 times [2023-11-26 10:46:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396380284] [2023-11-26 10:46:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:46:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-26 10:46:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396380284] [2023-11-26 10:46:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396380284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100812733] [2023-11-26 10:46:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:35,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:35,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:35,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:35,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:46:35,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:46:35,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100812733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:35,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-26 10:46:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939464] [2023-11-26 10:46:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:35,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:35,660 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:46:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:35,697 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-11-26 10:46:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-26 10:46:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:35,699 INFO L225 Difference]: With dead ends: 40 [2023-11-26 10:46:35,699 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:46:35,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:35,703 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:35,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:46:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-26 10:46:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-26 10:46:35,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2023-11-26 10:46:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:35,720 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-26 10:46:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:46:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-26 10:46:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:46:35,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:35,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:35,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:35,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:35,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:35,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:35,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1584330763, now seen corresponding path program 1 times [2023-11-26 10:46:35,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:35,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915820215] [2023-11-26 10:46:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:35,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:46:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:46:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-26 10:46:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:46:36,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:36,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915820215] [2023-11-26 10:46:36,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915820215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801322443] [2023-11-26 10:46:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:36,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:36,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:36,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 10:46:36,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:46:36,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801322443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:36,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:36,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-26 10:46:36,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826972210] [2023-11-26 10:46:36,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:36,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:36,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:36,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:36,360 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:46:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:36,383 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-26 10:46:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-26 10:46:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:36,385 INFO L225 Difference]: With dead ends: 36 [2023-11-26 10:46:36,385 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 10:46:36,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:36,389 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:36,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 10:46:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-26 10:46:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-26 10:46:36,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2023-11-26 10:46:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:36,405 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-26 10:46:36,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 10:46:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-26 10:46:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:46:36,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:36,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:36,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:36,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:36,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1105168803, now seen corresponding path program 1 times [2023-11-26 10:46:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385398356] [2023-11-26 10:46:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-26 10:46:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:46:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 10:46:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 10:46:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385398356] [2023-11-26 10:46:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385398356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441467845] [2023-11-26 10:46:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:36,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:36,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:36,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:46:36,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 10:46:36,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 10:46:36,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441467845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:36,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:36,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-26 10:46:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245840820] [2023-11-26 10:46:36,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:36,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:36,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:36,988 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:46:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:37,041 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-11-26 10:46:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:46:37,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-11-26 10:46:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:37,043 INFO L225 Difference]: With dead ends: 51 [2023-11-26 10:46:37,044 INFO L226 Difference]: Without dead ends: 31 [2023-11-26 10:46:37,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:37,045 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:37,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-26 10:46:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-26 10:46:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-26 10:46:37,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2023-11-26 10:46:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:37,052 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-26 10:46:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:46:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-26 10:46:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 10:46:37,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:37,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:37,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:37,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:37,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:37,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:37,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1956133820, now seen corresponding path program 2 times [2023-11-26 10:46:37,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:37,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096761142] [2023-11-26 10:46:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:37,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 10:46:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 10:46:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:37,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-26 10:46:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-26 10:46:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:37,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096761142] [2023-11-26 10:46:37,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096761142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599506507] [2023-11-26 10:46:37,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:37,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:37,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:37,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:37,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:46:37,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:37,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:46:37,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-26 10:46:37,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-26 10:46:37,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599506507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:37,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:37,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-26 10:46:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579799793] [2023-11-26 10:46:37,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:37,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:46:37,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:46:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:37,774 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 10:46:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:37,830 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2023-11-26 10:46:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:46:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-11-26 10:46:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:37,832 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:46:37,832 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 10:46:37,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:37,834 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:37,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 10:46:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-26 10:46:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-26 10:46:37,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2023-11-26 10:46:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:37,852 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-26 10:46:37,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 10:46:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-26 10:46:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 10:46:37,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:37,857 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:37,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:38,065 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:38,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash -538144458, now seen corresponding path program 3 times [2023-11-26 10:46:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:38,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229892693] [2023-11-26 10:46:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:38,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-26 10:46:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:38,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 10:46:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:38,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-26 10:46:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 10:46:38,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229892693] [2023-11-26 10:46:38,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229892693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153556833] [2023-11-26 10:46:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:38,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:38,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:38,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:38,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:46:38,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:46:38,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:38,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:38,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-26 10:46:38,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-26 10:46:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153556833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:38,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-26 10:46:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621669268] [2023-11-26 10:46:38,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 10:46:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 10:46:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:46:38,731 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:38,823 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2023-11-26 10:46:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:46:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-11-26 10:46:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:38,825 INFO L225 Difference]: With dead ends: 65 [2023-11-26 10:46:38,826 INFO L226 Difference]: Without dead ends: 41 [2023-11-26 10:46:38,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:46:38,827 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:38,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-26 10:46:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-26 10:46:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-26 10:46:38,835 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 55 [2023-11-26 10:46:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:38,835 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-26 10:46:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-26 10:46:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 10:46:38,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:38,837 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:38,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:39,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:46:39,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:39,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1112987572, now seen corresponding path program 4 times [2023-11-26 10:46:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680098761] [2023-11-26 10:46:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:39,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-26 10:46:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:39,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 10:46:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:39,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-26 10:46:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-26 10:46:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:39,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680098761] [2023-11-26 10:46:39,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680098761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:39,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385776827] [2023-11-26 10:46:39,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:46:39,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:39,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:39,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:46:39,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:46:39,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:39,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:46:39,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 57 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-26 10:46:39,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-26 10:46:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385776827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:39,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-11-26 10:46:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286049071] [2023-11-26 10:46:39,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:46:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:46:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:46:39,783 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:39,854 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-11-26 10:46:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 10:46:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2023-11-26 10:46:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:39,856 INFO L225 Difference]: With dead ends: 82 [2023-11-26 10:46:39,857 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 10:46:39,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:46:39,861 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:39,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 10:46:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-26 10:46:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-11-26 10:46:39,878 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 60 [2023-11-26 10:46:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:39,878 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-11-26 10:46:39,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-11-26 10:46:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-26 10:46:39,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:39,885 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:39,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:40,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:46:40,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:40,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash -424769866, now seen corresponding path program 5 times [2023-11-26 10:46:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:40,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190587870] [2023-11-26 10:46:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:40,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 10:46:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:40,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-26 10:46:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-26 10:46:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-26 10:46:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190587870] [2023-11-26 10:46:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190587870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455293299] [2023-11-26 10:46:40,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:46:40,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:40,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:40,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:40,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:46:41,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-26 10:46:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:41,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:46:41,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2023-11-26 10:46:41,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-11-26 10:46:41,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455293299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:41,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:41,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-11-26 10:46:41,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236655501] [2023-11-26 10:46:41,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:41,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:46:41,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:46:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:46:41,930 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:42,052 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2023-11-26 10:46:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 10:46:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2023-11-26 10:46:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:42,055 INFO L225 Difference]: With dead ends: 119 [2023-11-26 10:46:42,055 INFO L226 Difference]: Without dead ends: 79 [2023-11-26 10:46:42,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:46:42,057 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:42,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-26 10:46:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-26 10:46:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2023-11-26 10:46:42,067 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 97 [2023-11-26 10:46:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:42,068 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2023-11-26 10:46:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2023-11-26 10:46:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-26 10:46:42,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:42,070 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 13, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:42,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:42,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:42,279 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:42,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1752967244, now seen corresponding path program 6 times [2023-11-26 10:46:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:42,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959928332] [2023-11-26 10:46:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:42,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:43,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:46:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-26 10:46:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:43,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-26 10:46:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 2742 trivial. 0 not checked. [2023-11-26 10:46:43,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959928332] [2023-11-26 10:46:43,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959928332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:43,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053064419] [2023-11-26 10:46:43,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:46:43,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:43,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:46:43,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-26 10:46:43,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:43,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:46:43,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 1240 proven. 21 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2023-11-26 10:46:43,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-11-26 10:46:43,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053064419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:43,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:43,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-11-26 10:46:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880754373] [2023-11-26 10:46:43,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:46:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:46:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:46:43,990 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:44,070 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2023-11-26 10:46:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 10:46:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 170 [2023-11-26 10:46:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:44,072 INFO L225 Difference]: With dead ends: 152 [2023-11-26 10:46:44,072 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:46:44,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-11-26 10:46:44,074 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:44,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 223 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:46:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-26 10:46:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-11-26 10:46:44,085 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 170 [2023-11-26 10:46:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:44,085 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-11-26 10:46:44,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-11-26 10:46:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-26 10:46:44,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:44,088 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:44,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:44,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:44,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:44,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash -679588106, now seen corresponding path program 7 times [2023-11-26 10:46:44,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:44,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254983517] [2023-11-26 10:46:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:45,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-26 10:46:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:45,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-26 10:46:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:45,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-11-26 10:46:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:46:45,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:45,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254983517] [2023-11-26 10:46:45,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254983517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:45,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213138851] [2023-11-26 10:46:45,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:46:45,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:45,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:45,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:46:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:45,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:46:45,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:46:45,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:46:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213138851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:46,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:46,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 33 [2023-11-26 10:46:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814862366] [2023-11-26 10:46:46,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 10:46:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 10:46:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:46:46,014 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:46:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:46,083 INFO L93 Difference]: Finished difference Result 176 states and 227 transitions. [2023-11-26 10:46:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 10:46:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 179 [2023-11-26 10:46:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:46,085 INFO L225 Difference]: With dead ends: 176 [2023-11-26 10:46:46,085 INFO L226 Difference]: Without dead ends: 104 [2023-11-26 10:46:46,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:46:46,087 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:46,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-26 10:46:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-26 10:46:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2023-11-26 10:46:46,099 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 179 [2023-11-26 10:46:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:46,099 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2023-11-26 10:46:46,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:46:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2023-11-26 10:46:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-26 10:46:46,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:46,103 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 30, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:46,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:46,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:46,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1591040778, now seen corresponding path program 8 times [2023-11-26 10:46:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:46,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987072126] [2023-11-26 10:46:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 10:46:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-26 10:46:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2023-11-26 10:46:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:46:48,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:48,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987072126] [2023-11-26 10:46:48,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987072126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:48,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158497000] [2023-11-26 10:46:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:48,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:48,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:48,141 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:48,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:46:48,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:48,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 10:46:48,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:46:48,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-11-26 10:46:50,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158497000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:50,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:50,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 33] total 63 [2023-11-26 10:46:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82726519] [2023-11-26 10:46:50,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-26 10:46:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-26 10:46:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-26 10:46:50,176 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:46:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:50,294 INFO L93 Difference]: Finished difference Result 206 states and 271 transitions. [2023-11-26 10:46:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-26 10:46:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 195 [2023-11-26 10:46:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:50,296 INFO L225 Difference]: With dead ends: 206 [2023-11-26 10:46:50,296 INFO L226 Difference]: Without dead ends: 134 [2023-11-26 10:46:50,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-26 10:46:50,299 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:50,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-26 10:46:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-11-26 10:46:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 129 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2023-11-26 10:46:50,313 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 195 [2023-11-26 10:46:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:50,313 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2023-11-26 10:46:50,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 10:46:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2023-11-26 10:46:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-26 10:46:50,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:50,317 INFO L195 NwaCegarLoop]: trace histogram [60, 42, 42, 42, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:50,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:50,524 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:50,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1495617994, now seen corresponding path program 9 times [2023-11-26 10:46:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739828926] [2023-11-26 10:46:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:50,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:51,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-26 10:46:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:51,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-26 10:46:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:51,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-11-26 10:46:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 3131 trivial. 0 not checked. [2023-11-26 10:46:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739828926] [2023-11-26 10:46:51,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739828926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:51,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397819617] [2023-11-26 10:46:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:46:51,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:51,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:51,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:46:55,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-26 10:46:55,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:55,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 10:46:55,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 1240 proven. 105 refuted. 0 times theorem prover too weak. 3311 trivial. 0 not checked. [2023-11-26 10:46:56,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4551 trivial. 0 not checked. [2023-11-26 10:46:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397819617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:56,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2023-11-26 10:46:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820596931] [2023-11-26 10:46:56,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-26 10:46:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-26 10:46:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 10:46:56,750 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:56,925 INFO L93 Difference]: Finished difference Result 225 states and 281 transitions. [2023-11-26 10:46:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-26 10:46:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 225 [2023-11-26 10:46:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:56,930 INFO L225 Difference]: With dead ends: 225 [2023-11-26 10:46:56,930 INFO L226 Difference]: Without dead ends: 155 [2023-11-26 10:46:56,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 10:46:56,933 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:56,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-26 10:46:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2023-11-26 10:46:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 148 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 172 transitions. [2023-11-26 10:46:56,960 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 172 transitions. Word has length 225 [2023-11-26 10:46:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:56,961 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 172 transitions. [2023-11-26 10:46:56,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 10:46:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 172 transitions. [2023-11-26 10:46:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-26 10:46:56,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:56,966 INFO L195 NwaCegarLoop]: trace histogram [60, 45, 45, 45, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:56,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:57,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:57,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1923158315, now seen corresponding path program 10 times [2023-11-26 10:46:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:57,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973491028] [2023-11-26 10:46:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:58,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-26 10:46:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:58,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2023-11-26 10:46:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:58,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-11-26 10:46:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 3666 trivial. 0 not checked. [2023-11-26 10:46:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973491028] [2023-11-26 10:46:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973491028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31580018] [2023-11-26 10:46:58,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:46:58,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:58,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:58,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:46:59,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:46:59,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:59,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:46:59,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 3668 trivial. 0 not checked. [2023-11-26 10:46:59,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 3666 trivial. 0 not checked. [2023-11-26 10:46:59,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31580018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:59,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:59,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-26 10:46:59,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376931605] [2023-11-26 10:46:59,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:59,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 10:46:59,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 10:46:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:46:59,643 INFO L87 Difference]: Start difference. First operand 153 states and 172 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:46:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:59,787 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2023-11-26 10:46:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 10:46:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 250 [2023-11-26 10:46:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:59,790 INFO L225 Difference]: With dead ends: 293 [2023-11-26 10:46:59,790 INFO L226 Difference]: Without dead ends: 204 [2023-11-26 10:46:59,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 10:46:59,792 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:59,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 141 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-26 10:46:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-26 10:46:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.1758793969849246) internal successors, (234), 199 states have internal predecessors, (234), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2023-11-26 10:46:59,803 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 250 [2023-11-26 10:46:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:59,803 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2023-11-26 10:46:59,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 34 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 10:46:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2023-11-26 10:46:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-11-26 10:46:59,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:59,811 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:59,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:00,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:00,020 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:00,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 649946582, now seen corresponding path program 11 times [2023-11-26 10:47:00,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:00,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005982761] [2023-11-26 10:47:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:00,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:02,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-26 10:47:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:03,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-11-26 10:47:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:03,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2023-11-26 10:47:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16275 backedges. 0 proven. 7798 refuted. 0 times theorem prover too weak. 8477 trivial. 0 not checked. [2023-11-26 10:47:03,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:03,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005982761] [2023-11-26 10:47:03,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005982761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:03,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69588991] [2023-11-26 10:47:03,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:47:03,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:03,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:03,623 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:03,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cbf09f5-2845-43c6-b9a0-966243670f64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process