./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya --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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:22:21,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:22:21,438 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:22:21,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:22:21,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:22:21,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:22:21,465 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:22:21,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:22:21,466 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:22:21,467 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:22:21,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:22:21,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:22:21,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:22:21,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:22:21,469 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:22:21,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:22:21,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:22:21,471 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:22:21,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:22:21,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:22:21,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:22:21,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:22:21,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:22:21,477 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:22:21,477 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:22:21,478 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:22:21,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:22:21,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:22:21,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:22:21,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:22:21,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:22:21,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:22:21,480 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:22:21,481 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:22:21,481 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:22:21,481 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:22:21,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:22:21,482 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:22:21,482 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:22:21,482 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:22:21,482 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:22:21,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:22:21,483 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_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2023-11-29 06:22:21,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:22:21,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:22:21,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:22:21,707 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:22:21,708 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:22:21,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/res2o.c [2023-11-29 06:22:24,473 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:22:24,628 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:22:24,628 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/sv-benchmarks/c/array-fpi/res2o.c [2023-11-29 06:22:24,634 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/data/66cd5a7fa/1d0684a5e8cd4426864b01c1337920b0/FLAG5ad8bd62c [2023-11-29 06:22:24,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/data/66cd5a7fa/1d0684a5e8cd4426864b01c1337920b0 [2023-11-29 06:22:24,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:22:24,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:22:24,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:22:24,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:22:24,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:22:24,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e7c941e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24, skipping insertion in model container [2023-11-29 06:22:24,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,680 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:22:24,821 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_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2023-11-29 06:22:24,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:22:24,854 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:22:24,867 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_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2023-11-29 06:22:24,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:22:24,893 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:22:24,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24 WrapperNode [2023-11-29 06:22:24,894 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:22:24,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:22:24,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:22:24,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:22:24,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,929 INFO L138 Inliner]: procedures = 17, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 121 [2023-11-29 06:22:24,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:22:24,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:22:24,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:22:24,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:22:24,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,943 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,957 INFO L175 MemorySlicer]: Split 24 memory accesses to 6 slices as follows [2, 8, 8, 2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0]. The 7 writes are split as follows [0, 0, 4, 1, 1, 1]. [2023-11-29 06:22:24,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,963 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,969 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:22:24,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:22:24,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:22:24,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:22:24,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (1/1) ... [2023-11-29 06:22:24,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:22:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:25,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:22:25,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:22:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:22:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:22:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:22:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:22:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:22:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:22:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 06:22:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:22:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:22:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:22:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:22:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:22:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:22:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 06:22:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:22:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:22:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:22:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:22:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:22:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:22:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:22:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:22:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 06:22:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:22:25,133 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:22:25,135 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:22:25,315 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:22:25,352 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:22:25,352 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 06:22:25,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:25 BoogieIcfgContainer [2023-11-29 06:22:25,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:22:25,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:22:25,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:22:25,359 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:22:25,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:22:24" (1/3) ... [2023-11-29 06:22:25,360 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@877758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:22:25, skipping insertion in model container [2023-11-29 06:22:25,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:22:24" (2/3) ... [2023-11-29 06:22:25,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@877758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:22:25, skipping insertion in model container [2023-11-29 06:22:25,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:22:25" (3/3) ... [2023-11-29 06:22:25,362 INFO L112 eAbstractionObserver]: Analyzing ICFG res2o.c [2023-11-29 06:22:25,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:22:25,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:22:25,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:22:25,425 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;@61b7057c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:22:25,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:22:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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) [2023-11-29 06:22:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:22:25,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:25,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:25,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:25,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash -652346536, now seen corresponding path program 1 times [2023-11-29 06:22:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:25,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157251609] [2023-11-29 06:22:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:25,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:25,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157251609] [2023-11-29 06:22:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157251609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:22:25,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485396014] [2023-11-29 06:22:25,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:22:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:22:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:22:25,666 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-11-29 06:22:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:25,695 INFO L93 Difference]: Finished difference Result 41 states and 67 transitions. [2023-11-29 06:22:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:22:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2023-11-29 06:22:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:25,703 INFO L225 Difference]: With dead ends: 41 [2023-11-29 06:22:25,704 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 06:22:25,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:22:25,710 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:25,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:22:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 06:22:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 06:22:25,742 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) [2023-11-29 06:22:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-29 06:22:25,744 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 18 [2023-11-29 06:22:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:25,744 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-29 06:22:25,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-11-29 06:22:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-29 06:22:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:22:25,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:25,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:22:25,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:25,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash 582671336, now seen corresponding path program 1 times [2023-11-29 06:22:25,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:25,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362288019] [2023-11-29 06:22:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:25,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362288019] [2023-11-29 06:22:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362288019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:25,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:22:25,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383594877] [2023-11-29 06:22:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:22:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:22:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:22:25,917 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-29 06:22:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:25,978 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2023-11-29 06:22:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:22:25,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2023-11-29 06:22:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:25,979 INFO L225 Difference]: With dead ends: 39 [2023-11-29 06:22:25,980 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 06:22:25,980 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 [2023-11-29 06:22:25,982 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:25,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:22:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 06:22:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 06:22:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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) [2023-11-29 06:22:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-29 06:22:25,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2023-11-29 06:22:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:25,989 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-29 06:22:25,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-29 06:22:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-29 06:22:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 06:22:25,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:25,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:25,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:22:25,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:25,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2036974465, now seen corresponding path program 1 times [2023-11-29 06:22:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:25,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177028529] [2023-11-29 06:22:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177028529] [2023-11-29 06:22:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177028529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850442980] [2023-11-29 06:22:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:27,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:27,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:27,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:22:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:27,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 06:22:27,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:27,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:27,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:22:28,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:28,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:28,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:22:28,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-11-29 06:22:28,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 06:22:28,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 06:22:28,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 06:22:28,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:22:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:28,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:28,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-29 06:22:28,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 56 [2023-11-29 06:22:29,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-29 06:22:29,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-29 06:22:29,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-29 06:22:29,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-11-29 06:22:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:29,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850442980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:29,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:29,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2023-11-29 06:22:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535882859] [2023-11-29 06:22:29,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 06:22:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 06:22:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 06:22:29,153 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 40 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:29,624 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-29 06:22:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:22:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 06:22:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:29,626 INFO L225 Difference]: With dead ends: 36 [2023-11-29 06:22:29,626 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 06:22:29,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:22:29,629 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:29,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 108 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:22:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 06:22:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-11-29 06:22:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-29 06:22:29,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2023-11-29 06:22:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:29,637 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-29 06:22:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-29 06:22:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:22:29,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:29,638 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:29,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:22:29,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:29,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:29,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1252308332, now seen corresponding path program 2 times [2023-11-29 06:22:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344990415] [2023-11-29 06:22:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:22:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344990415] [2023-11-29 06:22:29,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344990415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:29,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733602548] [2023-11-29 06:22:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:29,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:29,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:29,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:22:30,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:30,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:30,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:22:30,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:22:30,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:22:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733602548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:30,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:30,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-29 06:22:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124343466] [2023-11-29 06:22:30,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:22:30,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:22:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:22:30,182 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2023-11-29 06:22:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:30,446 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2023-11-29 06:22:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:22:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 06:22:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:30,448 INFO L225 Difference]: With dead ends: 69 [2023-11-29 06:22:30,448 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 06:22:30,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:22:30,450 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:30,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:22:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 06:22:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 06:22:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-11-29 06:22:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-29 06:22:30,471 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 25 [2023-11-29 06:22:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:30,472 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-29 06:22:30,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2023-11-29 06:22:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-29 06:22:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:22:30,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:30,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:30,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:22:30,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:30,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:30,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -9571384, now seen corresponding path program 3 times [2023-11-29 06:22:30,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:30,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656958242] [2023-11-29 06:22:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:30,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:33,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:33,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656958242] [2023-11-29 06:22:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656958242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:33,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996665140] [2023-11-29 06:22:33,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:22:33,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:33,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:33,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:33,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:22:33,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:22:33,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:33,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 06:22:33,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:33,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:33,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:22:33,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:22:33,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:33,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:22:34,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:34,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:22:34,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:22:34,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:22:34,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-11-29 06:22:34,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-11-29 06:22:34,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:34,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 06:22:35,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 06:22:35,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-29 06:22:35,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:35,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 06:22:35,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:22:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:35,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:36,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2023-11-29 06:22:36,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:36,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1648 treesize of output 1600 [2023-11-29 06:22:36,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2023-11-29 06:22:36,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:36,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2442 treesize of output 2346 [2023-11-29 06:22:36,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-29 06:22:36,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:36,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 342 [2023-11-29 06:22:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996665140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:36,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 21] total 62 [2023-11-29 06:22:36,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919308961] [2023-11-29 06:22:36,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 06:22:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 06:22:36,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=3402, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 06:22:36,727 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 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) [2023-11-29 06:22:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:41,346 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-11-29 06:22:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 06:22:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 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 30 [2023-11-29 06:22:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:41,348 INFO L225 Difference]: With dead ends: 74 [2023-11-29 06:22:41,348 INFO L226 Difference]: Without dead ends: 68 [2023-11-29 06:22:41,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1455, Invalid=11427, Unknown=0, NotChecked=0, Total=12882 [2023-11-29 06:22:41,354 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:41,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 112 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:22:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-29 06:22:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2023-11-29 06:22:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 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) [2023-11-29 06:22:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-11-29 06:22:41,371 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 30 [2023-11-29 06:22:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:41,371 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-11-29 06:22:41,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 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) [2023-11-29 06:22:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-11-29 06:22:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 06:22:41,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:41,373 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:41,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:22:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:41,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:41,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2005563918, now seen corresponding path program 4 times [2023-11-29 06:22:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:41,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797344786] [2023-11-29 06:22:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:22:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797344786] [2023-11-29 06:22:41,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797344786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391532386] [2023-11-29 06:22:41,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:22:41,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:41,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:41,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:22:41,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:22:41,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:41,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:22:41,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:22:41,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:22:41,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391532386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:41,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:41,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 06:22:41,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546733899] [2023-11-29 06:22:41,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:22:41,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:22:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:22:41,932 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2023-11-29 06:22:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:42,115 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2023-11-29 06:22:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:22:42,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 31 [2023-11-29 06:22:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:42,116 INFO L225 Difference]: With dead ends: 112 [2023-11-29 06:22:42,116 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 06:22:42,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:22:42,117 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 73 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:42,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 34 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:22:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 06:22:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2023-11-29 06:22:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 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) [2023-11-29 06:22:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-11-29 06:22:42,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 31 [2023-11-29 06:22:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:42,128 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-11-29 06:22:42,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) [2023-11-29 06:22:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-11-29 06:22:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:22:42,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:42,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:42,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:22:42,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:42,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:42,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1894151210, now seen corresponding path program 5 times [2023-11-29 06:22:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:42,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637619404] [2023-11-29 06:22:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:42,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:22:42,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:42,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637619404] [2023-11-29 06:22:42,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637619404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:42,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439528955] [2023-11-29 06:22:42,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:22:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:42,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:42,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:42,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:22:42,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:22:42,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:42,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:22:42,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:22:42,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:22:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439528955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:42,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 06:22:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133475854] [2023-11-29 06:22:42,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:22:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:22:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:22:42,811 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) 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) [2023-11-29 06:22:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:42,937 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-29 06:22:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:22:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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 34 [2023-11-29 06:22:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:42,938 INFO L225 Difference]: With dead ends: 45 [2023-11-29 06:22:42,938 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 06:22:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:22:42,940 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 23 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:22:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 06:22:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-29 06:22:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-29 06:22:42,950 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2023-11-29 06:22:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:42,950 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-29 06:22:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) 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) [2023-11-29 06:22:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-29 06:22:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 06:22:42,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:42,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:42,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:22:43,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:43,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:43,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1890824991, now seen corresponding path program 6 times [2023-11-29 06:22:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:43,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207098552] [2023-11-29 06:22:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:46,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:46,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207098552] [2023-11-29 06:22:46,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207098552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:46,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564492354] [2023-11-29 06:22:46,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:22:46,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:46,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:46,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:46,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:22:46,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:22:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:46,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-29 06:22:46,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:46,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:46,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:22:46,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:22:46,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:46,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 06:22:46,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:46,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:22:47,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 06:22:47,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:22:47,417 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 06:22:47,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 06:22:47,570 INFO L349 Elim1Store]: treesize reduction 27, result has 28.9 percent of original size [2023-11-29 06:22:47,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2023-11-29 06:22:48,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:22:48,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:22:48,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:22:48,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-11-29 06:22:48,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-11-29 06:22:48,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 28 [2023-11-29 06:22:49,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:49,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 21 [2023-11-29 06:22:49,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 06:22:49,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-29 06:22:49,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 06:22:49,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:49,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 21 [2023-11-29 06:22:49,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:22:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:49,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:50,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 56 [2023-11-29 06:22:50,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 104 [2023-11-29 06:22:51,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2023-11-29 06:22:51,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:51,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 342874 treesize of output 332634 [2023-11-29 06:22:51,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 90 [2023-11-29 06:22:51,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:51,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10227 treesize of output 9587 [2023-11-29 06:22:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:51,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564492354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:51,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 29] total 83 [2023-11-29 06:22:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067257975] [2023-11-29 06:22:51,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:51,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-29 06:22:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-29 06:22:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=6144, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 06:22:51,911 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 83 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 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) [2023-11-29 06:22:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:58,510 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2023-11-29 06:22:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 06:22:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 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 36 [2023-11-29 06:22:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:58,511 INFO L225 Difference]: With dead ends: 73 [2023-11-29 06:22:58,511 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 06:22:58,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1703, Invalid=14809, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 06:22:58,516 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:58,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 118 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:22:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 06:22:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2023-11-29 06:22:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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) [2023-11-29 06:22:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-11-29 06:22:58,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 36 [2023-11-29 06:22:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:58,530 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-11-29 06:22:58,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 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) [2023-11-29 06:22:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-11-29 06:22:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 06:22:58,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:58,531 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:58,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:22:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:58,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:58,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1426212148, now seen corresponding path program 7 times [2023-11-29 06:22:58,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977782879] [2023-11-29 06:22:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:22:58,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:58,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977782879] [2023-11-29 06:22:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977782879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:58,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182356612] [2023-11-29 06:22:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:22:58,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:58,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:58,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:22:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:59,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:22:59,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:22:59,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:22:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182356612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:59,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 06:22:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8000585] [2023-11-29 06:22:59,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:22:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:22:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:22:59,170 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:59,404 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2023-11-29 06:22:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:22:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 06:22:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:59,405 INFO L225 Difference]: With dead ends: 117 [2023-11-29 06:22:59,405 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 06:22:59,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:22:59,407 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:59,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 35 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:22:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 06:22:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2023-11-29 06:22:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-11-29 06:22:59,425 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 37 [2023-11-29 06:22:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:59,425 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-11-29 06:22:59,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-11-29 06:22:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 06:22:59,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:59,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:59,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:22:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:59,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:59,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1209072381, now seen corresponding path program 8 times [2023-11-29 06:22:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824099777] [2023-11-29 06:22:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:22:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824099777] [2023-11-29 06:22:59,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824099777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736336291] [2023-11-29 06:22:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:59,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:59,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:22:59,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:59,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:22:59,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:23:00,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 06:23:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736336291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:00,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 06:23:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137807230] [2023-11-29 06:23:00,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:00,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:23:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:23:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:23:00,134 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2023-11-29 06:23:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:23:00,312 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-29 06:23:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:23:00,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 40 [2023-11-29 06:23:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:23:00,313 INFO L225 Difference]: With dead ends: 52 [2023-11-29 06:23:00,313 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 06:23:00,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:23:00,315 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:23:00,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:23:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 06:23:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-29 06:23:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2023-11-29 06:23:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-29 06:23:00,334 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2023-11-29 06:23:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:23:00,334 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-29 06:23:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2023-11-29 06:23:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-29 06:23:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 06:23:00,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:23:00,335 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:00,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:23:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:23:00,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:23:00,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash -324439128, now seen corresponding path program 9 times [2023-11-29 06:23:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399279721] [2023-11-29 06:23:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:05,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399279721] [2023-11-29 06:23:05,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399279721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697328895] [2023-11-29 06:23:05,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:23:05,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:05,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:05,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:23:05,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:23:05,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:05,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 138 conjunts are in the unsatisfiable core [2023-11-29 06:23:05,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:05,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:05,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:23:05,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:23:06,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:06,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 06:23:06,139 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-11-29 06:23:06,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 40 [2023-11-29 06:23:06,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:06,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:23:06,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:06,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 06:23:06,862 INFO L349 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-11-29 06:23:06,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 48 [2023-11-29 06:23:07,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:07,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:23:07,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 06:23:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:08,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:08,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-11-29 06:23:08,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:08,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:09,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:09,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:09,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:09,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 64 [2023-11-29 06:23:09,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 62 [2023-11-29 06:23:09,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-11-29 06:23:10,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-11-29 06:23:10,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 24 [2023-11-29 06:23:10,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 30 [2023-11-29 06:23:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:10,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:10,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:10,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 58 [2023-11-29 06:23:10,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 06:23:11,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-29 06:23:11,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 06:23:11,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2023-11-29 06:23:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:11,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:11,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 59 [2023-11-29 06:23:11,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:23:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:11,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:14,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 177 [2023-11-29 06:23:14,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:14,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 184692214 treesize of output 183381494 [2023-11-29 06:23:16,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 146 [2023-11-29 06:23:16,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:16,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 448178574 treesize of output 442935694 [2023-11-29 06:23:18,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 117 [2023-11-29 06:23:18,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:18,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91574 treesize of output 89014 [2023-11-29 06:23:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697328895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:18,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 41, 39] total 110 [2023-11-29 06:23:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046134678] [2023-11-29 06:23:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-29 06:23:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-29 06:23:18,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=10987, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 06:23:18,294 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 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) [2023-11-29 06:23:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:23:34,050 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2023-11-29 06:23:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 06:23:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 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 42 [2023-11-29 06:23:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:23:34,051 INFO L225 Difference]: With dead ends: 96 [2023-11-29 06:23:34,051 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 06:23:34,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8802 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=3038, Invalid=26032, Unknown=0, NotChecked=0, Total=29070 [2023-11-29 06:23:34,054 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 141 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:23:34,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 178 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 06:23:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 06:23:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2023-11-29 06:23:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2023-11-29 06:23:34,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 42 [2023-11-29 06:23:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:23:34,077 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2023-11-29 06:23:34,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 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) [2023-11-29 06:23:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2023-11-29 06:23:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 06:23:34,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:23:34,078 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:34,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:23:34,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:34,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:23:34,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1298182271, now seen corresponding path program 10 times [2023-11-29 06:23:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:34,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772727141] [2023-11-29 06:23:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 06:23:34,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772727141] [2023-11-29 06:23:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772727141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418016270] [2023-11-29 06:23:34,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:23:34,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:34,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:34,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:34,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:23:34,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:23:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:34,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:23:34,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 06:23:34,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 06:23:34,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418016270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:34,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:34,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 06:23:34,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558653172] [2023-11-29 06:23:34,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:34,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:23:34,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:23:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:23:34,715 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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) [2023-11-29 06:23:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:23:34,990 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2023-11-29 06:23:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:23:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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 43 [2023-11-29 06:23:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:23:34,991 INFO L225 Difference]: With dead ends: 134 [2023-11-29 06:23:34,992 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 06:23:34,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:23:34,993 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:23:34,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:23:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 06:23:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-11-29 06:23:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2023-11-29 06:23:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-29 06:23:35,021 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2023-11-29 06:23:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:23:35,021 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-29 06:23:35,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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) [2023-11-29 06:23:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-29 06:23:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:23:35,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:23:35,021 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:35,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:23:35,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:35,222 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:23:35,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1058673654, now seen corresponding path program 11 times [2023-11-29 06:23:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292022646] [2023-11-29 06:23:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:35,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:23:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292022646] [2023-11-29 06:23:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292022646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717217466] [2023-11-29 06:23:35,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:23:35,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:35,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:35,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:23:36,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:23:36,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:36,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:23:36,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:23:36,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:23:36,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717217466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:36,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:36,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 06:23:36,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305604321] [2023-11-29 06:23:36,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:36,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:23:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:23:36,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:23:36,305 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2023-11-29 06:23:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:23:36,481 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-29 06:23:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:23:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) Word has length 46 [2023-11-29 06:23:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:23:36,482 INFO L225 Difference]: With dead ends: 59 [2023-11-29 06:23:36,482 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 06:23:36,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:23:36,483 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:23:36,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 26 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:23:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 06:23:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 06:23:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 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) [2023-11-29 06:23:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-11-29 06:23:36,513 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2023-11-29 06:23:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:23:36,513 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-11-29 06:23:36,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2023-11-29 06:23:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-11-29 06:23:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 06:23:36,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:23:36,514 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:36,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:23:36,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:36,714 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:23:36,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1760100799, now seen corresponding path program 12 times [2023-11-29 06:23:36,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:36,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055907477] [2023-11-29 06:23:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055907477] [2023-11-29 06:23:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055907477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727412331] [2023-11-29 06:23:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:23:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:43,738 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:43,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:23:44,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:23:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:44,099 WARN L260 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 166 conjunts are in the unsatisfiable core [2023-11-29 06:23:44,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:44,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:44,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:23:44,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:23:44,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:44,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 06:23:44,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:44,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-29 06:23:44,678 INFO L349 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2023-11-29 06:23:44,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 50 [2023-11-29 06:23:45,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:45,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:23:45,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 06:23:45,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-29 06:23:45,804 INFO L349 Elim1Store]: treesize reduction 72, result has 38.5 percent of original size [2023-11-29 06:23:45,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 57 [2023-11-29 06:23:46,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:46,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:23:47,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 06:23:47,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-29 06:23:47,540 INFO L349 Elim1Store]: treesize reduction 72, result has 38.5 percent of original size [2023-11-29 06:23:47,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 57 [2023-11-29 06:23:48,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:48,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:49,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:49,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:23:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:49,645 INFO L349 Elim1Store]: treesize reduction 16, result has 72.9 percent of original size [2023-11-29 06:23:49,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 75 [2023-11-29 06:23:49,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 76 [2023-11-29 06:23:50,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-11-29 06:23:50,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-11-29 06:23:50,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 28 [2023-11-29 06:23:50,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 33 [2023-11-29 06:23:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:51,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:51,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 51 [2023-11-29 06:23:51,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 06:23:51,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 06:23:51,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-29 06:23:52,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 06:23:52,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 06:23:52,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:52,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:52,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:23:52,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:52,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 87 [2023-11-29 06:23:52,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 81 [2023-11-29 06:23:52,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:23:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:53,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:57,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 259 [2023-11-29 06:23:57,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:57,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54286904630 treesize of output 54052023606 [2023-11-29 06:24:02,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 222 [2023-11-29 06:24:03,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:03,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137713728373258 treesize of output 136751655698954 [2023-11-29 06:24:11,837 WARN L293 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 20291 DAG size of output: 99 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:24:13,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 185 [2023-11-29 06:24:13,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:13,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22689942 treesize of output 22231190 [2023-11-29 06:24:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:13,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727412331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:13,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:13,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 47, 45] total 127 [2023-11-29 06:24:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100030020] [2023-11-29 06:24:13,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:13,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-11-29 06:24:13,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-11-29 06:24:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=14848, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 06:24:13,967 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 127 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 states have internal predecessors, (136), 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) [2023-11-29 06:24:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:24:42,454 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2023-11-29 06:24:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 06:24:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 states have internal predecessors, (136), 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 48 [2023-11-29 06:24:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:24:42,456 INFO L225 Difference]: With dead ends: 100 [2023-11-29 06:24:42,456 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 06:24:42,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12140 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=3638, Invalid=35764, Unknown=0, NotChecked=0, Total=39402 [2023-11-29 06:24:42,460 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:24:42,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 149 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 06:24:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 06:24:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2023-11-29 06:24:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 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) [2023-11-29 06:24:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-11-29 06:24:42,514 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 48 [2023-11-29 06:24:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:24:42,514 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-11-29 06:24:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 states have internal predecessors, (136), 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) [2023-11-29 06:24:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-11-29 06:24:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 06:24:42,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:24:42,515 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:42,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:24:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:42,716 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:24:42,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -86738988, now seen corresponding path program 13 times [2023-11-29 06:24:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:42,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012665847] [2023-11-29 06:24:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:24:42,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012665847] [2023-11-29 06:24:42,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012665847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920493009] [2023-11-29 06:24:42,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:24:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:42,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:42,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:24:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:43,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:24:43,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:24:43,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:24:43,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920493009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:43,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:43,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 06:24:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700636748] [2023-11-29 06:24:43,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:43,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:24:43,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:24:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:24:43,345 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-11-29 06:24:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:24:43,771 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2023-11-29 06:24:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:24:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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 49 [2023-11-29 06:24:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:24:43,772 INFO L225 Difference]: With dead ends: 172 [2023-11-29 06:24:43,772 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 06:24:43,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:24:43,774 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:24:43,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 33 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:24:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 06:24:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2023-11-29 06:24:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 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) [2023-11-29 06:24:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-29 06:24:43,812 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 49 [2023-11-29 06:24:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:24:43,812 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-29 06:24:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-11-29 06:24:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-29 06:24:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 06:24:43,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:24:43,812 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:43,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:24:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:24:44,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:24:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash -138378851, now seen corresponding path program 14 times [2023-11-29 06:24:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493117318] [2023-11-29 06:24:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:24:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493117318] [2023-11-29 06:24:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493117318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235208101] [2023-11-29 06:24:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:24:44,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:44,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:44,239 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:44,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:24:44,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:24:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:44,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:24:44,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:24:44,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 06:24:44,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235208101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:44,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:44,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 06:24:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254977346] [2023-11-29 06:24:44,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:44,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:24:44,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:24:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:24:44,720 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-11-29 06:24:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:24:45,041 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-11-29 06:24:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:24:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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 52 [2023-11-29 06:24:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:24:45,043 INFO L225 Difference]: With dead ends: 66 [2023-11-29 06:24:45,043 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 06:24:45,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:24:45,044 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:24:45,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:24:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 06:24:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-29 06:24:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 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) [2023-11-29 06:24:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-11-29 06:24:45,075 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 52 [2023-11-29 06:24:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:24:45,075 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-11-29 06:24:45,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-11-29 06:24:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-11-29 06:24:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 06:24:45,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:24:45,076 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:45,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:24:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:45,276 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:24:45,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash 182934408, now seen corresponding path program 15 times [2023-11-29 06:24:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901759022] [2023-11-29 06:24:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901759022] [2023-11-29 06:24:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901759022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981604987] [2023-11-29 06:24:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:24:56,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:56,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:56,187 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:56,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:24:56,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:24:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:56,916 WARN L260 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 193 conjunts are in the unsatisfiable core [2023-11-29 06:24:56,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:57,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:24:57,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:24:57,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:24:57,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:57,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 06:24:57,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:57,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-29 06:24:57,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:57,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 06:24:57,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:57,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 06:24:58,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:24:58,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:24:58,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 06:24:58,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-29 06:24:59,128 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2023-11-29 06:24:59,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 57 [2023-11-29 06:24:59,419 INFO L349 Elim1Store]: treesize reduction 104, result has 30.2 percent of original size [2023-11-29 06:24:59,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 59 treesize of output 71 [2023-11-29 06:25:00,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:25:00,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:25:00,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 06:25:00,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-29 06:25:01,303 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2023-11-29 06:25:01,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 57 [2023-11-29 06:25:01,676 INFO L349 Elim1Store]: treesize reduction 104, result has 30.2 percent of original size [2023-11-29 06:25:01,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 59 treesize of output 71 [2023-11-29 06:25:02,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:25:03,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:25:03,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:25:03,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 06:25:04,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 06:25:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:25:04,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:25:04,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 133 [2023-11-29 06:25:04,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 125 [2023-11-29 06:25:04,724 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 06:25:05,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 06:25:05,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-11-29 06:25:06,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 28 [2023-11-29 06:25:06,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 33 [2023-11-29 06:25:06,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 42 [2023-11-29 06:25:06,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 49 [2023-11-29 06:25:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:25:07,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:25:07,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 121 [2023-11-29 06:25:09,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 06:25:09,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-29 06:25:09,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-29 06:25:09,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 06:25:09,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-11-29 06:25:09,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:25:10,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:25:10,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 137 [2023-11-29 06:25:10,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 94 [2023-11-29 06:25:11,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:25:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:25:11,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:25:18,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 312 [2023-11-29 06:25:24,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:25:24,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input -480996754622969830 treesize of output 4130689263804418074 [2023-11-29 06:29:39,261 WARN L293 SmtUtils]: Spent 4.24m on a formula simplification. DAG size of input: 95279 DAG size of output: 338 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:29:58,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 265 [2023-11-29 06:30:01,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:30:01,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20920953227706358 treesize of output 20859380576550902 [2023-11-29 06:30:39,137 WARN L293 SmtUtils]: Spent 37.31s on a formula simplification. DAG size of input: 60211 DAG size of output: 313 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:31:03,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 217 [2023-11-29 06:31:03,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:31:03,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 357564486 treesize of output 353894470 [2023-11-29 06:31:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:07,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981604987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:07,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:07,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 53, 51] total 146 [2023-11-29 06:31:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753269062] [2023-11-29 06:31:07,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:07,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2023-11-29 06:31:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2023-11-29 06:31:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1777, Invalid=19393, Unknown=0, NotChecked=0, Total=21170 [2023-11-29 06:31:07,206 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 146 states, 146 states have (on average 1.0547945205479452) internal successors, (154), 146 states have internal predecessors, (154), 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) [2023-11-29 06:33:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:33:00,121 INFO L93 Difference]: Finished difference Result 209 states and 247 transitions. [2023-11-29 06:33:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-11-29 06:33:00,122 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.0547945205479452) internal successors, (154), 146 states have internal predecessors, (154), 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 54 [2023-11-29 06:33:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:33:00,123 INFO L225 Difference]: With dead ends: 209 [2023-11-29 06:33:00,124 INFO L226 Difference]: Without dead ends: 184 [2023-11-29 06:33:00,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23866 ImplicationChecksByTransitivity, 128.8s TimeCoverageRelationStatistics Valid=7386, Invalid=69620, Unknown=0, NotChecked=0, Total=77006 [2023-11-29 06:33:00,126 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 467 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 4057 mSolverCounterSat, 1065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 5122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1065 IncrementalHoareTripleChecker+Valid, 4057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:33:00,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 418 Invalid, 5122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1065 Valid, 4057 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2023-11-29 06:33:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-29 06:33:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 99. [2023-11-29 06:33:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 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) [2023-11-29 06:33:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2023-11-29 06:33:00,216 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 54 [2023-11-29 06:33:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:33:00,216 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2023-11-29 06:33:00,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.0547945205479452) internal successors, (154), 146 states have internal predecessors, (154), 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) [2023-11-29 06:33:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2023-11-29 06:33:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 06:33:00,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:33:00,217 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:00,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:33:00,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:33:00,418 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:33:00,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash 574254286, now seen corresponding path program 16 times [2023-11-29 06:33:00,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063245149] [2023-11-29 06:33:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 06:33:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063245149] [2023-11-29 06:33:01,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063245149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502536866] [2023-11-29 06:33:01,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:33:01,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:01,086 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:33:01,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:33:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:01,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:33:01,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 06:33:01,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 06:33:02,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502536866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:02,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 06:33:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379466387] [2023-11-29 06:33:02,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:02,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:33:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:33:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:33:02,108 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2023-11-29 06:33:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:33:03,074 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2023-11-29 06:33:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:33:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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 55 [2023-11-29 06:33:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:33:03,075 INFO L225 Difference]: With dead ends: 199 [2023-11-29 06:33:03,075 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 06:33:03,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:33:03,076 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:33:03,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 38 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:33:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 06:33:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2023-11-29 06:33:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 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) [2023-11-29 06:33:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2023-11-29 06:33:03,158 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 55 [2023-11-29 06:33:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:33:03,158 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2023-11-29 06:33:03,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2023-11-29 06:33:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2023-11-29 06:33:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 06:33:03,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:33:03,159 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:03,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:33:03,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:33:03,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:33:03,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:03,360 INFO L85 PathProgramCache]: Analyzing trace with hash 462054879, now seen corresponding path program 17 times [2023-11-29 06:33:03,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:03,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676694975] [2023-11-29 06:33:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:03,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 06:33:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676694975] [2023-11-29 06:33:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676694975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321865637] [2023-11-29 06:33:03,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:33:03,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:03,897 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:03,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6b3dd9-55b6-4e55-b5d3-c2cd6cde87e3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process