./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-1.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_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/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_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/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_605f6381-b2b1-48ca-85ad-c0449e8968d4/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 f2acf1d88f73f9b993c11cfca399c08f166d9054c3a2d816b9c02e1296c27b35 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:50:24,643 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:50:24,770 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:50:24,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:50:24,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:50:24,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:50:24,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:50:24,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:50:24,822 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:50:24,826 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:50:24,827 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:50:24,827 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:50:24,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:50:24,830 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:50:24,830 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:50:24,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:50:24,831 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:50:24,832 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:50:24,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:50:24,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:50:24,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:50:24,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:50:24,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:50:24,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:50:24,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:50:24,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:50:24,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:50:24,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:50:24,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:50:24,838 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:50:24,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:50:24,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:24,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:50:24,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:50:24,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:50:24,841 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:50:24,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:50:24,841 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:50:24,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:50:24,842 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:50:24,842 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:50:24,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:50:24,843 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_605f6381-b2b1-48ca-85ad-c0449e8968d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2acf1d88f73f9b993c11cfca399c08f166d9054c3a2d816b9c02e1296c27b35 [2023-11-26 10:50:25,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:50:25,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:50:25,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:50:25,150 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:50:25,150 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:50:25,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-programs/copysome2-1.i [2023-11-26 10:50:28,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:50:28,471 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:50:28,472 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/sv-benchmarks/c/array-programs/copysome2-1.i [2023-11-26 10:50:28,480 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/data/330537f38/e12c5be43dfd4daa8c2c23570a9014d8/FLAGe774a44d2 [2023-11-26 10:50:28,497 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/data/330537f38/e12c5be43dfd4daa8c2c23570a9014d8 [2023-11-26 10:50:28,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:50:28,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:50:28,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:28,503 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:50:28,508 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:50:28,509 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725c32dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28, skipping insertion in model container [2023-11-26 10:50:28,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:50:28,694 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_605f6381-b2b1-48ca-85ad-c0449e8968d4/sv-benchmarks/c/array-programs/copysome2-1.i[804,817] [2023-11-26 10:50:28,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:28,735 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:50:28,752 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_605f6381-b2b1-48ca-85ad-c0449e8968d4/sv-benchmarks/c/array-programs/copysome2-1.i[804,817] [2023-11-26 10:50:28,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:50:28,793 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:50:28,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28 WrapperNode [2023-11-26 10:50:28,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:50:28,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:28,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:50:28,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:50:28,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,853 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2023-11-26 10:50:28,854 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:50:28,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:50:28,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:50:28,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:50:28,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,899 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 3, 4, 4]. 31 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 2, 1, 3]. [2023-11-26 10:50:28,900 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,918 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:50:28,932 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:50:28,933 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:50:28,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:50:28,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (1/1) ... [2023-11-26 10:50:28,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:50:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:28,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:50:29,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:50:29,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:50:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:50:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:50:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:50:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:50:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:50:29,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:50:29,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:50:29,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:50:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:50:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:50:29,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:50:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:50:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:50:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:50:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:50:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:50:29,155 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:50:29,158 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:50:29,386 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:50:29,427 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:50:29,428 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 10:50:29,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:29 BoogieIcfgContainer [2023-11-26 10:50:29,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:50:29,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:50:29,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:50:29,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:50:29,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:50:28" (1/3) ... [2023-11-26 10:50:29,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d52c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:29, skipping insertion in model container [2023-11-26 10:50:29,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:50:28" (2/3) ... [2023-11-26 10:50:29,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d52c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:50:29, skipping insertion in model container [2023-11-26 10:50:29,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:50:29" (3/3) ... [2023-11-26 10:50:29,439 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2023-11-26 10:50:29,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:50:29,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:50:29,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:50:29,561 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;@7c9a2809, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:50:29,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:50:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:50:29,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:29,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:29,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:29,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash -112711166, now seen corresponding path program 1 times [2023-11-26 10:50:29,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:29,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750641405] [2023-11-26 10:50:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:50:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750641405] [2023-11-26 10:50:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750641405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:50:29,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048961974] [2023-11-26 10:50:29,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:29,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:50:29,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:29,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:50:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:50:29,884 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:29,959 INFO L93 Difference]: Finished difference Result 41 states and 67 transitions. [2023-11-26 10:50:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:50:29,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:50:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:29,970 INFO L225 Difference]: With dead ends: 41 [2023-11-26 10:50:29,970 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 10:50:29,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:50:29,977 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:29,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 10:50:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-11-26 10:50:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-26 10:50:30,016 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-11-26 10:50:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:30,017 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-26 10:50:30,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-26 10:50:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:50:30,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:30,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:30,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:50:30,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:30,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash -865460509, now seen corresponding path program 1 times [2023-11-26 10:50:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474653258] [2023-11-26 10:50:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:50:30,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474653258] [2023-11-26 10:50:30,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474653258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:50:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986193569] [2023-11-26 10:50:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:30,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:30,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:50:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:30,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:50:30,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:50:30,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:50:30,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986193569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:30,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:50:30,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:50:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349373781] [2023-11-26 10:50:30,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:50:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:50:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:30,475 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:30,628 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2023-11-26 10:50:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:50:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-26 10:50:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:30,630 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:50:30,630 INFO L226 Difference]: Without dead ends: 40 [2023-11-26 10:50:30,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:50:30,632 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:30,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 20 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:50:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-26 10:50:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-26 10:50:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-11-26 10:50:30,650 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 17 [2023-11-26 10:50:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:30,651 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-11-26 10:50:30,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-11-26 10:50:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:50:30,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:30,655 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:30,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:50:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:30,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:30,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash -287792660, now seen corresponding path program 2 times [2023-11-26 10:50:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:30,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270929974] [2023-11-26 10:50:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-26 10:50:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270929974] [2023-11-26 10:50:31,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270929974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:31,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:50:31,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:50:31,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69029829] [2023-11-26 10:50:31,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:31,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:31,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:31,151 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:31,199 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2023-11-26 10:50:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-26 10:50:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:31,201 INFO L225 Difference]: With dead ends: 71 [2023-11-26 10:50:31,202 INFO L226 Difference]: Without dead ends: 40 [2023-11-26 10:50:31,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:50:31,204 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:31,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-26 10:50:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-26 10:50:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-11-26 10:50:31,213 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 38 [2023-11-26 10:50:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:31,214 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-11-26 10:50:31,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-11-26 10:50:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:50:31,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:31,216 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:31,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:50:31,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:31,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:31,217 INFO L85 PathProgramCache]: Analyzing trace with hash 733275694, now seen corresponding path program 1 times [2023-11-26 10:50:31,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:31,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511439122] [2023-11-26 10:50:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:31,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-26 10:50:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511439122] [2023-11-26 10:50:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511439122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:50:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452707790] [2023-11-26 10:50:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:31,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:31,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:50:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:31,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:50:31,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-26 10:50:31,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-26 10:50:31,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452707790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:31,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:50:31,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-26 10:50:31,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284472296] [2023-11-26 10:50:31,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:31,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:50:31,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:50:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:50:31,713 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:32,149 INFO L93 Difference]: Finished difference Result 130 states and 187 transitions. [2023-11-26 10:50:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:50:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-26 10:50:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:32,153 INFO L225 Difference]: With dead ends: 130 [2023-11-26 10:50:32,153 INFO L226 Difference]: Without dead ends: 96 [2023-11-26 10:50:32,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:50:32,155 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 159 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:32,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 25 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:50:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-26 10:50:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-26 10:50:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 95 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2023-11-26 10:50:32,174 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 38 [2023-11-26 10:50:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:32,174 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2023-11-26 10:50:32,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2023-11-26 10:50:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 10:50:32,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:32,179 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:32,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 10:50:32,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:32,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1198075282, now seen corresponding path program 2 times [2023-11-26 10:50:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861535532] [2023-11-26 10:50:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:32,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-26 10:50:33,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:33,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861535532] [2023-11-26 10:50:33,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861535532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:50:33,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564812794] [2023-11-26 10:50:33,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:50:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:33,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:33,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:50:33,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:50:33,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:50:33,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:50:33,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-26 10:50:33,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-26 10:50:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564812794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:33,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:50:33,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-11-26 10:50:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011233080] [2023-11-26 10:50:33,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:33,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:50:33,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:50:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:50:34,002 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:34,654 INFO L93 Difference]: Finished difference Result 866 states and 1155 transitions. [2023-11-26 10:50:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 10:50:34,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-11-26 10:50:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:34,669 INFO L225 Difference]: With dead ends: 866 [2023-11-26 10:50:34,669 INFO L226 Difference]: Without dead ends: 784 [2023-11-26 10:50:34,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:50:34,674 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 496 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:34,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 25 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:50:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-11-26 10:50:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 194. [2023-11-26 10:50:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.2797927461139897) internal successors, (247), 193 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 247 transitions. [2023-11-26 10:50:34,745 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 247 transitions. Word has length 94 [2023-11-26 10:50:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:34,746 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 247 transitions. [2023-11-26 10:50:34,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 247 transitions. [2023-11-26 10:50:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-26 10:50:34,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:34,760 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:34,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:34,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:34,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1305497138, now seen corresponding path program 3 times [2023-11-26 10:50:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:34,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227802543] [2023-11-26 10:50:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:34,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2023-11-26 10:50:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:37,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227802543] [2023-11-26 10:50:37,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227802543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:50:37,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392150888] [2023-11-26 10:50:37,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:50:37,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:37,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:37,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:50:39,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-26 10:50:39,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:50:39,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:50:39,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2228 trivial. 0 not checked. [2023-11-26 10:50:40,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 2228 trivial. 0 not checked. [2023-11-26 10:50:40,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392150888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:40,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:50:40,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 34 [2023-11-26 10:50:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037007787] [2023-11-26 10:50:40,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:40,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-26 10:50:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-26 10:50:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=709, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 10:50:40,428 INFO L87 Difference]: Start difference. First operand 194 states and 247 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:41,755 INFO L93 Difference]: Finished difference Result 435 states and 567 transitions. [2023-11-26 10:50:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 10:50:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2023-11-26 10:50:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:41,759 INFO L225 Difference]: With dead ends: 435 [2023-11-26 10:50:41,760 INFO L226 Difference]: Without dead ends: 269 [2023-11-26 10:50:41,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1434, Invalid=2472, Unknown=0, NotChecked=0, Total=3906 [2023-11-26 10:50:41,768 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 690 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:41,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 32 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:50:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-26 10:50:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 249. [2023-11-26 10:50:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0806451612903225) internal successors, (268), 248 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 268 transitions. [2023-11-26 10:50:41,815 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 268 transitions. Word has length 192 [2023-11-26 10:50:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:41,816 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 268 transitions. [2023-11-26 10:50:41,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 268 transitions. [2023-11-26 10:50:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-26 10:50:41,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:41,819 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:41,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:42,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:42,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:42,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1316299647, now seen corresponding path program 1 times [2023-11-26 10:50:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:42,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619507094] [2023-11-26 10:50:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-11-26 10:50:43,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619507094] [2023-11-26 10:50:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619507094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:50:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209863765] [2023-11-26 10:50:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:43,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:43,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:43,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:50:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:44,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 10:50:44,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-11-26 10:50:44,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:50:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2160 trivial. 0 not checked. [2023-11-26 10:50:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209863765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:50:45,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:50:45,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2023-11-26 10:50:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490264965] [2023-11-26 10:50:45,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:50:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-26 10:50:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-26 10:50:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2023-11-26 10:50:45,695 INFO L87 Difference]: Start difference. First operand 249 states and 268 transitions. Second operand has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:47,279 INFO L93 Difference]: Finished difference Result 1452 states and 1854 transitions. [2023-11-26 10:50:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-26 10:50:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-11-26 10:50:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:47,287 INFO L225 Difference]: With dead ends: 1452 [2023-11-26 10:50:47,287 INFO L226 Difference]: Without dead ends: 1232 [2023-11-26 10:50:47,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2023-11-26 10:50:47,290 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1102 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:47,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 30 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:50:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2023-11-26 10:50:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 404. [2023-11-26 10:50:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.1439205955334988) internal successors, (461), 403 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 461 transitions. [2023-11-26 10:50:47,360 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 461 transitions. Word has length 199 [2023-11-26 10:50:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:47,360 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 461 transitions. [2023-11-26 10:50:47,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 461 transitions. [2023-11-26 10:50:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-11-26 10:50:47,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:47,368 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:47,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:50:47,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:47,576 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:47,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 678781102, now seen corresponding path program 4 times [2023-11-26 10:50:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:47,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647341287] [2023-11-26 10:50:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:47,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:50:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2023-11-26 10:50:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:50:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647341287] [2023-11-26 10:50:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647341287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:50:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182072158] [2023-11-26 10:50:53,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:50:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:50:53,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:50:53,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:50:54,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:50:54,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:50:54,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:50:54,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:50:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 8498 trivial. 0 not checked. [2023-11-26 10:50:54,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:50:54,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182072158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:50:54,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:50:54,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [58] total 61 [2023-11-26 10:50:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452558194] [2023-11-26 10:50:54,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:50:54,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:50:54,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:50:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:50:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2023-11-26 10:50:54,492 INFO L87 Difference]: Start difference. First operand 404 states and 461 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:50:54,644 INFO L93 Difference]: Finished difference Result 864 states and 1029 transitions. [2023-11-26 10:50:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:50:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2023-11-26 10:50:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:50:54,649 INFO L225 Difference]: With dead ends: 864 [2023-11-26 10:50:54,649 INFO L226 Difference]: Without dead ends: 611 [2023-11-26 10:50:54,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2023-11-26 10:50:54,652 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:50:54,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:50:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2023-11-26 10:50:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2023-11-26 10:50:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.1065719360568385) internal successors, (623), 563 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 623 transitions. [2023-11-26 10:50:54,756 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 623 transitions. Word has length 402 [2023-11-26 10:50:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:50:54,757 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 623 transitions. [2023-11-26 10:50:54,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:50:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 623 transitions. [2023-11-26 10:50:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-11-26 10:50:54,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:50:54,765 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:50:54,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:50:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:50:54,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:50:54,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:50:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1489954514, now seen corresponding path program 5 times [2023-11-26 10:50:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:50:54,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333470253] [2023-11-26 10:50:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:50:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:50:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:51:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 9352 trivial. 0 not checked. [2023-11-26 10:51:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:51:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333470253] [2023-11-26 10:51:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333470253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:51:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371199167] [2023-11-26 10:51:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:51:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:51:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:51:00,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:51:00,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_605f6381-b2b1-48ca-85ad-c0449e8968d4/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process